Question 1

Carnival Cruise Lines reported the number of passengers (in millions) it served for the past 8 years.Compute the standard deviation for the data.Treat the data as a population. 
A).012
B).156
C).083
D).288
E)1.52

Accepted Answer

The answer of Carnival Cruise Lines reported the number of...

Question 2

For a sample of 10 days, Harkin Research recorded the number of visitors to Tilton.com's website.Determine the MAD for the data. 100, 100, 106, 93, 89, 95, 97, 181, 99, 100
A)30
B)10
C)23
D)15
E)7.5

Accepted Answer

The Mean Absolute Deviation (MAD) is calculated by finding the average of the absolute deviations from the mean. The mean of the data is 106, and the absolute deviations are 6, 6, 0, 13, 17, 11, 9, 75, 7, 6. The average of these deviations is 15.

Question 3

A data set contains only two values.One of the two values is 64.If the MAD is 9, what is the standard deviation for this data set?
A)6
B)81
C)3
D)9
E)12

Accepted Answer

The answer of A data set contains only two values.One...

Question 4

Online customers are asked to score the level of customer service they received at Gregory.com.Scores for 20 recent applicants are given below.Show the data in a frequency table, construct the corresponding bar chart.Describe the shape of the distribution. 9 6 8 9 9 5 6 8 5 6
8 9 7 6 8 9 6 5 6 9
A)normal
B)unimodal
C)bell-shaped
D)symmetric
E)bimodal

Accepted Answer

The answer of Online customers are asked to score the...

Question 5

The closing share price for G.E.stock over the past seven days is shown below.Compute the standard deviation for the data.Treat the data as a population. 112, 115, 111, 116, 116, 116, 112
A)4.23
B)2.07
C)2.79
D)3.18
E)2.54

Accepted Answer

The standard deviation for a population is calculated by taking the square root of the variance. First, find the mean of the data, then calculate the squared differences from the mean, find the average of those squared differences, and finally take the square root. The correct standard deviation for this data set is approximately 2.07.

Question 6

Below is a frequency table showing the number of new restaurants opened in the city over the past 24 months.Compute the mean number of openings per month over this 24-month period. 
A).97
B)1.29
C)1.06
D)1.61
E)1.74

Accepted Answer

The answer of Below is a frequency table showing the...

Question 7

Purchasing agent Angela Rodriguez reported the number of sales calls she received from suppliers each of the past 14 days.Compute the mean number of sales calls she received per day over the 14-day period. 
A)6.2
B)5.7
C)6.6
D)5.1
E)7.3

Accepted Answer

The answer of Purchasing agent Angela Rodriguez reported the number...

Question 8

The closing share price for G.E.stock over the past seven days is shown below.Compute the variance for the data.Treat the data as a population. 112, 115, 111, 116, 116, 116, 112
A)3.671
B)4.589
C)3.423
D)4.286
E)5.112

Accepted Answer

To calculate the variance, first find the mean of the data: (112 + 115 + 111 + 116 + 116 + 116 + 112) / 7 = 114. Next, find the squared differences from the mean: (112-114)², (115-114)², (111-114)², (116-114)², (116-114)², (116-114)², (112-114)². These are 4, 1, 9, 4, 4, 4, 4. The sum of these squared differences is 30. Divide by the number of data points (7) to get the variance: 30/7 = 4.286.

Question 9

Below is a frequency table showing the number of new restaurants opened in the city over the past 24 months.Compute the standard deviation of the number of openings data.Treat the data as a population. 
A).54
B)1.31
C)2.47
D)2.13
E)1.72

Accepted Answer

The answer of Below is a frequency table showing the...

Question 10

For a sample of 10 days, Harkin Research recorded the number of visitors to Tilton.com's website.Determine the variance for the data.Treat the data as a sample. 100, 100, 106, 93, 89, 95, 97, 181, 99, 100
A)26.75
B)715.8
C)654.9
D)515.2
E)32.7

Accepted Answer

To calculate the variance for a sample, we first find the mean (average) of the data, then subtract the mean from each data point, square the result, sum these squared differences, and finally divide by the number of data points minus one. For the given data: Mean = (100 + 100 + 106 + 93 + 89 + 95 + 97 + 181 + 99 + 100) / 10 = 1060 / 10 = 106. The squared differences from the mean are then calculated for each data point, summed, and divided by (n-1) = 9 (since it's a sample and not a population). The calculation yields a variance of approximately 715.8.

Question 11

Below is a frequency table showing the number of new restaurants opened in the city over the past 24 months.What is the median number of openings per month over this 24-month period. 
A).5
B)1
C)2
D)3
E)1.5

Accepted Answer

The answer of Below is a frequency table showing the...

Question 12

Carnival Cruise Lines reported the number of passengers (in millions) it served for the past 8 years.Compute the variance for the data.Treat the data as a population. 
A).012
B).156
C).083
D).229
E)1.52

Accepted Answer

The answer of Carnival Cruise Lines reported the number of...

Question 13

Carnival Cruise Lines reported the number of passengers (in millions) it served for the past 8 years.Compute the range for the data. 
A)1.2
B).6
C).5
D)1.5
E)1.0

Accepted Answer

The answer of Carnival Cruise Lines reported the number of...

Question 14

The table shows the life expectancy in years of the G8 countries (Datablog, Guardian.co.uk, July 8 2009).Treating the data as a population, what is the mean absolute deviation of life expectancy in the eight countries, in years? 
A)4.25
B)4.86
C)5.3
D)55.0
E)78

Accepted Answer

The answer of The table shows the life expectancy in...

Question 15

Purchasing agent Angela Rodriguez reported the number of sales calls she received from suppliers on each of the past 14 days.What is the median number of calls? 
A)8
B)7.5
C)5
D)6.5
E)6

Accepted Answer

The answer of Purchasing agent Angela Rodriguez reported the number...

Question 16

Below is a frequency table showing the number of new restaurants opened in the city over the past 24 months.Compute the variance of the number of openings data.Treat the data as a population. 
A)1.71
B)1.15
C)2.58
D)1.09
E)2.76

Accepted Answer

The answer of Below is a frequency table showing the...

Question 17

Carnival Cruise Lines reported the number of passengers (in millions) it served for the past 8 years.Compute the MAD for the data. 
A).46
B).23
C)1.34
D).12
E).38

Accepted Answer

The answer of Carnival Cruise Lines reported the number of...

Question 18

For a sample of 10 days, Harkin Research recorded the number of visitors to Tilton.com's website.Compute the standard deviation for the data.Treat the data as a sample. 100, 100, 106, 93, 89, 95, 97, 181, 99, 100
A)542.6
B)15.35
C)26.75
D)682.8
E)715.8

Accepted Answer

The standard deviation for a sample is calculated by finding the square root of the variance. First, find the mean of the data, then calculate the squared differences from the mean, find the average of these squared differences, and finally take the square root. The correct standard deviation for this data set is approximately 26.75.

Question 19

The table shows the life expectancy in years of the G8 countries (Datablog, Guardian.co.uk, July 8 2009).Treating the data as a population, what is the variance of life expectancy in the eight countries, in years squared? 
A)5.3
B)5.7
C)10.15
D)28.25
E)32.3

Accepted Answer

The answer of The table shows the life expectancy in...

Question 20

The table shows the life expectancy in years of the G8 countries (Datablog, Guardian.co.uk, July 8 2009).What is the range of life expectancy in the eight countries? 
A)17 years
B)25 years
C)28.25 years
D)78 years
E)83 years

Accepted Answer

The answer of The table shows the life expectancy in...

Quiz 2: Descriptive Statistics I: Elementary Data Presentation and Description

Carnival Cruise Lines reported the number of passengers (in millions) it served for the past 8 years.Compute the standard deviation for the data.Treat the data as a population.

For a sample of 10 days, Harkin Research recorded the number of visitors to Tilton.com's website.Determine the MAD for the data. 100, 100, 106, 93, 89, 95, 97, 181, 99, 100

A data set contains only two values.One of the two values is 64.If the MAD is 9, what is the standard deviation for this data set?

Online customers are asked to score the level of customer service they received at Gregory.com.Scores for 20 recent applicants are given below.Show the data in a frequency table, construct the corresponding bar chart.Describe the shape of the distribution. 9 6 8 9 9 5 6 8 5 6 8 9 7 6 8 9 6 5 6 9

The closing share price for G.E.stock over the past seven days is shown below.Compute the standard deviation for the data.Treat the data as a population. 112, 115, 111, 116, 116, 116, 112

Below is a frequency table showing the number of new restaurants opened in the city over the past 24 months.Compute the mean number of openings per month over this 24-month period.

Purchasing agent Angela Rodriguez reported the number of sales calls she received from suppliers each of the past 14 days.Compute the mean number of sales calls she received per day over the 14-day period.

The closing share price for G.E.stock over the past seven days is shown below.Compute the variance for the data.Treat the data as a population. 112, 115, 111, 116, 116, 116, 112

Below is a frequency table showing the number of new restaurants opened in the city over the past 24 months.Compute the standard deviation of the number of openings data.Treat the data as a population.

For a sample of 10 days, Harkin Research recorded the number of visitors to Tilton.com's website.Determine the variance for the data.Treat the data as a sample. 100, 100, 106, 93, 89, 95, 97, 181, 99, 100

Below is a frequency table showing the number of new restaurants opened in the city over the past 24 months.What is the median number of openings per month over this 24-month period.

Carnival Cruise Lines reported the number of passengers (in millions) it served for the past 8 years.Compute the variance for the data.Treat the data as a population.

Carnival Cruise Lines reported the number of passengers (in millions) it served for the past 8 years.Compute the range for the data.

The table shows the life expectancy in years of the G8 countries (Datablog, Guardian.co.uk, July 8 2009) .Treating the data as a population, what is the mean absolute deviation of life expectancy in the eight countries, in years?

Purchasing agent Angela Rodriguez reported the number of sales calls she received from suppliers on each of the past 14 days.What is the median number of calls?

Below is a frequency table showing the number of new restaurants opened in the city over the past 24 months.Compute the variance of the number of openings data.Treat the data as a population.

Carnival Cruise Lines reported the number of passengers (in millions) it served for the past 8 years.Compute the MAD for the data.

For a sample of 10 days, Harkin Research recorded the number of visitors to Tilton.com's website.Compute the standard deviation for the data.Treat the data as a sample. 100, 100, 106, 93, 89, 95, 97, 181, 99, 100

The table shows the life expectancy in years of the G8 countries (Datablog, Guardian.co.uk, July 8 2009) .Treating the data as a population, what is the variance of life expectancy in the eight countries, in years squared?

The table shows the life expectancy in years of the G8 countries (Datablog, Guardian.co.uk, July 8 2009) .What is the range of life expectancy in the eight countries?