Deck 2: Presenting Data in Tables and Charts

Question 1

Instruction 2-5
The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.
$$\begin{array}{l}\begin{array} { l c } &\text { Relative }\\\text { Time (in Minutes) } & \text { Frequency } \\\hline 0 \text { but less than } 5 & 0.37 \\5 \text { but less than } 10 & 0.22 \\10 \text { but less than } 15 & 0.15 \\15 \text { but less than 20 } & 0.10 \\\text { 20 but less than 25 } & 0.07 \\25 \text { but less than } 30 & 0.07 \\30 \text { or more } & 0.02\end{array}\end{array}$$

-Referring to Instruction 2-5,if 10 calls lasted 30 minutes or more,how many calls lasted less than 5 minutes?

A)10
B)185
C)500
D)295

Answer 1

185

Question 2

Instruction 2-2
At a meeting of information systems officers for regional offices of a national company,a survey was taken to determine the number of employees the officers supervise in the operation of their departments,where X is the number of employees overseen by each information systems officer.
$$\begin{array} { l r } X & f \\\hline \hline 1 & 7 \\2 & 5 \\3 & 11 \\4 & 8 \\5 & 9\end{array}$$

-Referring to Instruction 2-2,across all of the regional offices,how many total employees were supervised by those surveyed?

A)40
B)200
C)127
D)15

Answer 2

127

Question 3

Histograms are used for numerical data while bar charts are suitable for categorical data.

Answer 3

True

Question 4

Research on human perception concludes that the bar chart is preferred to the pie chart,because the human eye can more accurately judge length comparisons against a fixed scale (as in a bar chart)than angular measures (as in a pie chart).

Question 5

The length of each bar in a bar chart represents the

A)midpoint of observations in each class.
B)average number of observations in each class.
C)proportion,frequency or percentage of observations in each class.
D)variances of observations in each class.

Question 6

One of the advantages of a pie chart is that it clearly shows that the total of all the categories of the pie adds to 100%.

Question 7

Instruction 2-5
The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.
$$\begin{array}{l}\begin{array} { l c } &\text { Relative }\\\text { Time (in Minutes) } & \text { Frequency } \\\hline 0 \text { but less than } 5 & 0.37 \\5 \text { but less than } 10 & 0.22 \\10 \text { but less than } 15 & 0.15 \\15 \text { but less than 20 } & 0.10 \\\text { 20 but less than 25 } & 0.07 \\25 \text { but less than } 30 & 0.07 \\30 \text { or more } & 0.02\end{array}\end{array}$$

-Referring to Instruction 2-5,if 1,000 calls were randomly sampled,how many calls lasted under 10 minutes?

A)590
B)370
C)410
D)220

Question 8

Apple Computer,Inc.collected information on the age of their customers.The youngest customer was 12 and the oldest was 72.To study the distribution of the age among its customers,it is best to use a pie chart.

Question 9

A histogram can have gaps between the bars,whereas bar charts cannot have gaps.

Question 10

Instruction 2-4
A survey was conducted to determine how people rated the quality of programming available on television.Respondents were asked to rate the overall quality from 0 (no quality at all)to 100 (extremely good quality).The stem-and-leaf display of the data is shown below.
$\begin{array} { l l } \text { Stem } & \text { Leaves } \\\hline 3 & 24 \\4 & 03478999 \\5 & 0112345 \\6 & 12566 \\7 & 01 \\8 & \\9 & 2\end{array}$

-Referring to Instruction 2-4,what percentage of the respondents rated overall television quality with a rating between 50 and 75 (inclusive)?

A)40
B)44
C)11
D)56

Question 11

You have collected information on the market share of five different search engines used by Australian Internet users in June 2012.Which of the following is the best for presenting the information?

A)A stem-and-leaf display.
B)A histogram.
C)A contingency table.
D)A pie chart.

Question 12

Instruction 2-4
A survey was conducted to determine how people rated the quality of programming available on television.Respondents were asked to rate the overall quality from 0 (no quality at all)to 100 (extremely good quality).The stem-and-leaf display of the data is shown below.
$\begin{array} { l l } \text { Stem } & \text { Leaves } \\\hline 3 & 24 \\4 & 03478999 \\5 & 0112345 \\6 & 12566 \\7 & 01 \\8 & \\9 & 2\end{array}$

-Referring to Instruction 2-4,what percentage of the respondents rated overall television quality with a rating of 80 or above?

A)96
B)100
C)0
D)4

Question 13

A professor of economics at a Tasmanian university wanted to determine which students were taking his tough economics course.Shown below is a pie chart of the results.What percentage of the class took the course prior to reaching their honours year?

A)86%
B)14%
C)54%
D)44%

Question 14

Instruction 2-1
An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance.A representative from a local insurance agency selected a random sample of insured drivers and recorded,X,the number of claims each made in the last 3 years,with the following results.
$$\begin{array} { r r } X & f \\\hline \hline 1 & 14 \\2 & 18 \\3 & 12 \\4 & 5 \\5 & 1\end{array}$$

-Referring to Instruction 2-1,how many drivers are represented in the sample?

A)18
B)50
C)5
D)15

Question 15

Instruction 2-4
A survey was conducted to determine how people rated the quality of programming available on television.Respondents were asked to rate the overall quality from 0 (no quality at all)to 100 (extremely good quality).The stem-and-leaf display of the data is shown below.
$\begin{array} { l l } \text { Stem } & \text { Leaves } \\\hline 3 & 24 \\4 & 03478999 \\5 & 0112345 \\6 & 12566 \\7 & 01 \\8 & \\9 & 2\end{array}$

-Referring to Instruction 2-4,what percentage of the respondents rated overall television quality with a rating of 50 or below?

A)44
B)56
C)11
D)40

Question 16

Instruction 2-5
The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.
$$\begin{array}{l}\begin{array} { l c } &\text { Relative }\\\text { Time (in Minutes) } & \text { Frequency } \\\hline 0 \text { but less than } 5 & 0.37 \\5 \text { but less than } 10 & 0.22 \\10 \text { but less than } 15 & 0.15 \\15 \text { but less than 20 } & 0.10 \\\text { 20 but less than 25 } & 0.07 \\25 \text { but less than } 30 & 0.07 \\30 \text { or more } & 0.02\end{array}\end{array}$$

-Referring to Instruction 2-5,if 100 calls were randomly sampled,how many calls lasted 15 minutes or longer?

A)74
B)14
C)10
D)26

Question 17

Instruction 2-5
The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.
$$\begin{array}{l}\begin{array} { l c } &\text { Relative }\\\text { Time (in Minutes) } & \text { Frequency } \\\hline 0 \text { but less than } 5 & 0.37 \\5 \text { but less than } 10 & 0.22 \\10 \text { but less than } 15 & 0.15 \\15 \text { but less than 20 } & 0.10 \\\text { 20 but less than 25 } & 0.07 \\25 \text { but less than } 30 & 0.07 \\30 \text { or more } & 0.02\end{array}\end{array}$$

-Referring to Instruction 2-5,what is the width of each class?

A)5 minutes
B)100%
C)2%
D)1 minute

Question 18

In a survey,150 executives were asked what they think is the most common mistake candidates make during job interviews.Six different mistakes were given.Which of the following is the best for presenting the information?

A)A bar chart.
B)A contingency table.
C)A stem-and-leaf display.
D)A histogram.

Question 19

Instruction 2-2
At a meeting of information systems officers for regional offices of a national company,a survey was taken to determine the number of employees the officers supervise in the operation of their departments,where X is the number of employees overseen by each information systems officer.
$$\begin{array} { l r } X & f \\\hline \hline 1 & 7 \\2 & 5 \\3 & 11 \\4 & 8 \\5 & 9\end{array}$$

-Retailers are always interested in determining why a customer selected their store to make a purchase.A clothing retailer conducted a customer survey to determine why its customers shopped at the store.The results are shown in the bar chart below.What proportion of the customers responded that they shopped at the store because of the merchandise or the convenience?

A)85%
B)70%
C)50%
D)35%

Question 20

Instruction 2-2
At a meeting of information systems officers for regional offices of a national company,a survey was taken to determine the number of employees the officers supervise in the operation of their departments,where X is the number of employees overseen by each information systems officer.
$$\begin{array} { l r } X & f \\\hline \hline 1 & 7 \\2 & 5 \\3 & 11 \\4 & 8 \\5 & 9\end{array}$$

-Referring to Instruction 2-2,how many regional offices are represented in the survey results?

A)11
B)40
C)15
D)5

Question 21

Instruction 2-5
The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.
$$\begin{array}{l}\begin{array} { l c } &\text { Relative }\\\text { Time (in Minutes) } & \text { Frequency } \\\hline 0 \text { but less than } 5 & 0.37 \\5 \text { but less than } 10 & 0.22 \\10 \text { but less than } 15 & 0.15 \\15 \text { but less than 20 } & 0.10 \\\text { 20 but less than 25 } & 0.07 \\25 \text { but less than } 30 & 0.07 \\30 \text { or more } & 0.02\end{array}\end{array}$$

-Referring to Instruction 2-5,if 100 calls were sampled,________ of them would have lasted less than 15 minutes.

A)10
B)26
C)74
D)None of the above.

Question 22

Instruction 2-7
The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in the Supreme Court of Victoria.
Note: 1L means the "low teens" - 10,11,12,13,or 14;1H means the "high teens" - 15,16,17,18,or 19;2L means the "low twenties" - 20,21,22,23,or 24,etc.
Referring to Instruction 2-7,the civil suit with the longest wait between when the suit was filed and when it was adjudicated had a wait of ________ months.

Question 23

Instruction 2-8
The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Instruction 2-8,the person who visited the health club less than anyone else in the sample visited the facility ________ times.

Question 24

Instruction 2-5
The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.
$$\begin{array}{l}\begin{array} { l c } &\text { Relative }\\\text { Time (in Minutes) } & \text { Frequency } \\\hline 0 \text { but less than } 5 & 0.37 \\5 \text { but less than } 10 & 0.22 \\10 \text { but less than } 15 & 0.15 \\15 \text { but less than 20 } & 0.10 \\\text { 20 but less than 25 } & 0.07 \\25 \text { but less than } 30 & 0.07 \\30 \text { or more } & 0.02\end{array}\end{array}$$

-Referring to Instruction 2-5,if 100 calls were sampled,________ of them would have lasted 20 minutes or more.

A)26
B)74
C)16
D)None of the above.

Question 25

Instruction 2-8
The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Instruction 2-8,the person who has the largest leaf associated with the smallest stem visited the facility ________ times.

Question 26

Instruction 2-7
The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in the Supreme Court of Victoria.
Note: 1L means the "low teens" - 10,11,12,13,or 14;1H means the "high teens" - 15,16,17,18,or 19;2L means the "low twenties" - 20,21,22,23,or 24,etc.
Referring to Instruction 2-7,locate the first leaf,i.e. ,the lowest valued leaf with the lowest valued stem.This represents a wait of ________ months.

Question 27

The stem-and-leaf display is often superior to the frequency distribution in that it maintains the original values for further analysis.

Question 28

Instruction 2-8
The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Instruction 2-8,________ of the 100 members visited the health club at least 52 times in a year.

Question 29

Instruction 2-7
The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in the Supreme Court of Victoria.
Note: 1L means the "low teens" - 10,11,12,13,or 14;1H means the "high teens" - 15,16,17,18,or 19;2L means the "low twenties" - 20,21,22,23,or 24,etc.
Referring to Instruction 2-7,________ percent of the cases were not adjudicated within the first 4 years.

Question 30

Instruction 2-8
The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Instruction 2-8,the person who visited the health club more than anyone else in the sample visited the facility ________ times.

Question 31

Instruction 2-5
The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.
$$\begin{array}{l}\begin{array} { l c } &\text { Relative }\\\text { Time (in Minutes) } & \text { Frequency } \\\hline 0 \text { but less than } 5 & 0.37 \\5 \text { but less than } 10 & 0.22 \\10 \text { but less than } 15 & 0.15 \\15 \text { but less than 20 } & 0.10 \\\text { 20 but less than 25 } & 0.07 \\25 \text { but less than } 30 & 0.07 \\30 \text { or more } & 0.02\end{array}\end{array}$$

-Referring to Instruction 2-5,if 100 calls were randomly sampled,________ of them would have lasted at least 15 minutes but less than 20 minutes.

A)0.16
B)10
C)0.10
D)16

Question 32

Instruction 2-7
The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in the Supreme Court of Victoria.
Note: 1L means the "low teens" - 10,11,12,13,or 14;1H means the "high teens" - 15,16,17,18,or 19;2L means the "low twenties" - 20,21,22,23,or 24,etc.
Referring to Instruction 2-7,if a frequency distribution with equal sized classes was made from this data,and the first class was "10 but less than 20",the cumulative percentage of the second class would be ________.

Question 33

Instruction 2-7
The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in the Supreme Court of Victoria.
Note: 1L means the "low teens" - 10,11,12,13,or 14;1H means the "high teens" - 15,16,17,18,or 19;2L means the "low twenties" - 20,21,22,23,or 24,etc.
Referring to Instruction 2-7,if a frequency distribution with equal sized classes was made from this data,and the first class was "10 but less than 20",the relative frequency of the third class would be ________.

Question 34

Instruction 2-7
The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in the Supreme Court of Victoria.
Note: 1L means the "low teens" - 10,11,12,13,or 14;1H means the "high teens" - 15,16,17,18,or 19;2L means the "low twenties" - 20,21,22,23,or 24,etc.
Referring to Instruction 2-7,the civil suit with the fourth shortest waiting time between when the suit was filed and when it was adjudicated had a wait of ________ months.

Question 35

Instruction 2-5
The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.
$$\begin{array}{l}\begin{array} { l c } &\text { Relative }\\\text { Time (in Minutes) } & \text { Frequency } \\\hline 0 \text { but less than } 5 & 0.37 \\5 \text { but less than } 10 & 0.22 \\10 \text { but less than } 15 & 0.15 \\15 \text { but less than 20 } & 0.10 \\\text { 20 but less than 25 } & 0.07 \\25 \text { but less than } 30 & 0.07 \\30 \text { or more } & 0.02\end{array}\end{array}$$

-Referring to Instruction 2-5,what is the cumulative relative frequency for the percentage of calls that lasted 10 minutes or more?

A)0.24
B)0.41
C)0.90
D)0.16

Question 36

Instruction 2-5
The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.
$$\begin{array}{l}\begin{array} { l c } &\text { Relative }\\\text { Time (in Minutes) } & \text { Frequency } \\\hline 0 \text { but less than } 5 & 0.37 \\5 \text { but less than } 10 & 0.22 \\10 \text { but less than } 15 & 0.15 \\15 \text { but less than 20 } & 0.10 \\\text { 20 but less than 25 } & 0.07 \\25 \text { but less than } 30 & 0.07 \\30 \text { or more } & 0.02\end{array}\end{array}$$

-Referring to Instruction 2-5,if 100 calls were sampled,________ of them would have lasted less than 5 minutes or at least 30 minutes or more.

A)39
B)35
C)37
D)None of the above.

Question 37

Instruction 2-7
The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in the Supreme Court of Victoria.
Note: 1L means the "low teens" - 10,11,12,13,or 14;1H means the "high teens" - 15,16,17,18,or 19;2L means the "low twenties" - 20,21,22,23,or 24,etc.
Referring to Instruction 2-7,if a frequency distribution with equal sized classes was made from this data,and the first class was "10 but less than 20",the frequency of that class would be ________.

Question 38

Data on the number of credit hours of 20,000 students at a public university enrolled in the first semester were collected.Which of the following is the best for presenting the information?

A)A contingency table.
B)A pie chart.
C)A stem-and-leaf display.
D)A Pareto chart.

Question 39

Instruction 2-7
The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in the Supreme Court of Victoria.
Note: 1L means the "low teens" - 10,11,12,13,or 14;1H means the "high teens" - 15,16,17,18,or 19;2L means the "low twenties" - 20,21,22,23,or 24,etc.
Referring to Instruction 2-7,________ percent of the cases were adjudicated within the first 2 years.

Question 40

Instruction 2-5
The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.
$$\begin{array}{l}\begin{array} { l c } &\text { Relative }\\\text { Time (in Minutes) } & \text { Frequency } \\\hline 0 \text { but less than } 5 & 0.37 \\5 \text { but less than } 10 & 0.22 \\10 \text { but less than } 15 & 0.15 \\15 \text { but less than 20 } & 0.10 \\\text { 20 but less than 25 } & 0.07 \\25 \text { but less than } 30 & 0.07 \\30 \text { or more } & 0.02\end{array}\end{array}$$

-Referring to Instruction 2-5,what is the cumulative relative frequency for the percentage of calls that lasted under 20 minutes?

A)0.59
B)0.10
C)0.84
D)0.76

Question 41

The sum of cumulative frequencies in a distribution always equals 1.

Question 42

When comparing two or more samples with different sample sizes,a relative frequency distribution or a percentage distribution should be used.

Question 43

In general,grouped frequency distributions should have between 5 and 15 class intervals.

Question 44

The sum of relative frequencies in a distribution always equals 1.

Question 45

If the values of the seventh and eighth class in a cumulative frequency distribution are the same,we know that there are no observations in the eighth class.

Question 46

Instruction 2-8
The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Instruction 2-8,________ of the 100 members visited the health club no more than 12 times in a year.

Question 47

Instruction 2-8
The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Instruction 2-8,if a frequency distribution with equal sized classes was made from this data,and the first class was "0 but less than 10",the frequency of the fifth class would be ________.

Question 48

A research analyst was directed to arrange raw data collected on the yield of wheat,ranging from 1 to 5 tonnes per hectare,in a frequency distribution.He should choose 2 as the class interval width.

Question 49

Apple Computer,Inc.collected information on the age of their customers.The youngest customer was 12 and the oldest was 72.To study the distribution of the age among its customers,it can use a percentage polygon.

Question 50

The relative frequency is the frequency in each class divided by the total number of observations.

Question 51

The percentage distribution cannot be constructed from the frequency distribution directly.

Question 52

The larger the number of observations in a numerical data set,the larger the number of class intervals needed for a grouped frequency distribution.

Question 53

Instruction 2-8
The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Instruction 2-8,if a frequency distribution with equal sized classes was made from this data,and the first class was "0 but less than 10",the cumulative percentage of the next-to-last class would be ________.

Question 54

The original data values cannot be assessed once they are grouped into a frequency distribution table.

Question 55

Ogives are plotted at the midpoints of the class groupings.

Question 56

When constructing a frequency distribution,classes should be selected in such a way that they are of equal width.

Question 57

Percentage polygons are plotted at the boundaries of the class groupings.

Question 58

Instruction 2-8
The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Instruction 2-8,if a frequency distribution with equal sized classes was made from this data,and the first class was "0 but less than 10",the relative frequency of the last class would be ________.

Question 59

Determining the class boundaries of a frequency distribution is highly subjective.

Question 60

Instruction 2-8
The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility.

Referring to Instruction 2-8,if a frequency distribution with equal sized classes was made from this data,and the first class was "0 but less than 10",the class midpoint of the third class would be ________.

Question 61

In general,a frequency distribution should have at least 8 class groups but no more than 20.

Question 62

When constructing polygons or histograms,the horizontal axis must specify the true zero or "origin" point so as not to distort the character of the data.

Question 63

When constructing charts,the following is plotted at the class midpoints

A)percentage polygons.
B)cumulative relative frequency ogives.
C)frequency histograms.
D)All of the above.

Question 64

If you wish to construct a graph of a relative frequency distribution,you would most likely construct an ogive first.

Question 65

Instruction 2-9
The frequency distribution below represents the rents of 250 randomly selected federally subsidised apartments in Sydney.

Referring to Instruction 2-9,________ apartments rented for at least $400 but less than $600.

Question 66

The width of each bar in a histogram corresponds to the

A)percentage of observations in each class.
B)midpoint of each class.
C)number of observations in each class.
D)differences between the boundaries of the class.

Question 67

Referring to the histogram from Figure 2-1,how many graduating students attended the luncheon?

A)388
B)275
C)4
D)152

Question 68

Referring to the histogram from Figure 2-1,if all the tickets purchased were used,how many guests attended the luncheon?

A)275
B)4
C)152
D)388

Question 69

A polygon can be constructed from a bar chart.

Question 70

The percentage polygon is formed by having the lower boundary of each class represent the data in that class and then connecting the sequence of lower boundaries at their respective class percentages.

Question 71

Data on 1,500 students' weight were collected at a university in Melbourne,Victoria.Which of the following is the best chart for presenting the information?

A)A pie chart.
B)A Pareto chart.
C)A histogram.
D)A side-by-side bar chart.

Question 72

Instruction 2-1
An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance.A representative from a local insurance agency selected a random sample of insured drivers and recorded,X,the number of claims each made in the last 3 years,with the following results.
$$\begin{array} { r r } X & f \\\hline \hline 1 & 14 \\2 & 18 \\3 & 12 \\4 & 5 \\5 & 1\end{array}$$

-Referring to Instruction 2-1,how many total claims are represented in the sample?

A)15
B)111
C)50
D)250

Question 73

When polygons or histograms are constructed,which axis must show the true zero or "origin"?

A)The vertical axis.
B)The horizontal axis.
C)Both the horizontal and vertical axes.
D)Neither the horizontal nor the vertical axis.

Question 74

True of False: To determine the width of class interval,divide the number of class groups by the range of the data.

Question 75

Instruction 2-2
At a meeting of information systems officers for regional offices of a national company,a survey was taken to determine the number of employees the officers supervise in the operation of their departments,where X is the number of employees overseen by each information systems officer.
$$\begin{array} { l r } X & f \\\hline \hline 1 & 7 \\2 & 5 \\3 & 11 \\4 & 8 \\5 & 9\end{array}$$

-Referring to Instruction 2-2,how many regional offices are represented in the survey results?

A)11
B)5
C)15
D)40

Question 76

An ogive is a cumulative percentage polygon.

Question 77

Instruction 2-9
The frequency distribution below represents the rents of 250 randomly selected federally subsidised apartments in Sydney.

Referring to Instruction 2-9,________ percent of the apartments rented for no less than $600.

Question 78

A good choice for the number of class groups to use in constructing frequency distribution is to have at least 5 but no more than 15 class groups.

Question 79

Instruction 2-2
At a meeting of information systems officers for regional offices of a national company,a survey was taken to determine the number of employees the officers supervise in the operation of their departments,where X is the number of employees overseen by each information systems officer.
$$\begin{array} { l r } X & f \\\hline \hline 1 & 7 \\2 & 5 \\3 & 11 \\4 & 8 \\5 & 9\end{array}$$

-Referring to Instruction 2-2,across all of the regional offices,how many total employees were supervised by those surveyed?

A)200
B)15
C)127
D)40

Question 80

Apple Computer,Inc.collected information on the age of their customers.The youngest customer was 12 and the oldest was 72.To study the percentage of their customers who are below a certain age,it can use an ogive.