Deck 3: Tables and Graphs for Summarizing Data

Question 1

The shape of the data set summarized in the stem-and-leaf diagram is best described as:

A) symmetric.
B) bimodal.
C) negatively skewed.
D) positively skewed.

Answer 1

positively skewed.

Question 2

The sum of all the relative frequencies of classes up to and including a particular class is defined as the:

A) relative frequency (RF).
B) boundary frequency (BF).
C) cumulative relative frequency (CRF).
D) frequency modulation (FM).

Answer 2

cumulative relative frequency (CRF).

Question 3

This histogram shows the age at which 548 patients were first diagnosed with diabetes.The shape of this histogram is best described as:

A) symmetric.
B) bimodal.
C) monomodal.
D) positively skewed.

Answer 3

bimodal.

Question 4

A distribution with only one peak is called:

A) single peaking.
B) multimodal.
C) bimodal.
D) unimodal.

Question 5

To assure prompt service, the city metro routinely records wait times at its various bus stops.The length of time a customer must wait for a bus is recorded to the nearest second.What type of data are these?

A) Qualitative
B) Discrete
C) Continuous
D) Multivariate

Question 6

If there are more than two observations on the same person, the data set is:

A) bivariate.
B) multivariate.
C) random.
D) univariate.

Question 7

A student counted the number of candies of each color in a bag of 57 Reese's Pieces.The results are shown in the bar graph. How many of the candies were colored orange?

A) 12
B) 51
C) 29
D) More information is needed.

Question 8

Judging from this stem-and-leaf display, the data set appears to be:

A) skewed.
B) uniform.
C) symmetric.
D) centered at 100.

Question 9

A student wants to use a curve to represent the number of students in each class over the school day.The student's friend says a bar chart should be used.Who is correct, and why?

A) The student; the curve is a more accurate representation.
B) The friend; the data on class sizes are discrete but a curve implies the data are continuous.
C) Both; either form of the graph gives the same information.
D) Neither; the graph should present the cumulative frequency.

Question 10

Concerning qualitative data, the ______________ of a particular class is the frequency of the class divided by the total number of observations.

A) relative frequency
B) numeric center
C) frequency
D) None of the above.

Question 11

Concerning univariate data, a _____________ or ______________ data set consists of non-numerical observations that may be placed in categories.

A) categorical; qualitative
B) categorical; quantitative
C) numerical; quantitative
D) numerical; qualitative

Question 12

A survey records the number of U.S.states each person has visited.This is an example of what type of data?

A) Categorical
B) Continuous
C) Discrete
D) Qualitative

Question 13

Concerning qualitative data, the _____________ of a particular class is the count for that class.

A) relative frequency
B) distribution
C) frequency
D) probability

Question 14

What data value is represented by the bold and underlined "1" in the stem-and-leaf diagram? (Note: It is bold and underlined for emphasis only.)

A) 31
B) 30001
C) 3001
D) 1

Question 15

What data value is represented by the bold and underlined "0" in the stem-and-leaf diagram? (Note: It is bold and underlined for emphasis only.)

A) 4000
B) 400
C) 40
D) 4

Question 16

A survey records a person's smoking status as either "yes" or "no." This survey is recording what kind of data?

A) Categorical/qualitative
B) Categorical/quantitative
C) Numerical/quantitative
D) Numerical/qualitative

Question 17

Two statistics students are arguing over which type of bar graph to use.One insists that a bar graph that displays the relative frequency will be better for displaying the overall shape of the data.The other holds that only a frequency bar graph will suffice.You happen along and hear their conversation.What advice do you give them?

A) The relative frequency bar graph is superior at displaying the overall shape of the data.
B) The frequency bar graph is superior at displaying the overall shape of the data.
C) A pie chart would be needed here to display the overall shape of the data.
D) Either bar graph would suffice, as they differ only in scale.The shape will be the same.

Question 18

What is the value of the data point represented by the bold and underlined "0" in the stem-and-leaf diagram? (Note: It is bold and underlined for emphasis only.)

A) 1
B) 10
C) 100
D) 1000

Question 19

This stem-and-leaf plot shows the lengths of reigns (in years) of the British monarchs.According to the plot, how many British rulers had reigns that lasted less than a full year?

A) 1
B) 3
C) 17
D) Need more information to answer the question

Question 20

Relative frequency is best suited to describing __________________ data.

A) continuous
B) quantitative
C) multivariate
D) qualitative

Question 21

This stem-and-leaf plot shows the lengths of reigns (in years) of the British monarchs.According to the plot, how many British rulers had reigns that lasted 32 years?

A) 0
B) 1
C) 2
D) 3

Question 22

This table summarizes the responses to a nationwide telephone survey conducted by the Pew Foundation in October 2010.U.S.adults ages 18 and older were asked, "Some people say there is only one true love for each person.Do you agree or disagree?" Some of the table values are purposely missing.What was the frequency of the "Don't Know" responses?

A) 78
B) 787
C) 813
D) Need more information to answer the question

Question 23

A student counted the number of candies of each color in a bag of 57 Reese's Pieces.The results are shown in the bar graph. What percentage of the candies were not colored orange?

A) 21%
B) 28%
C) 49%
D) 51%

Question 24

A numeric data set is __________________ if the set of all possible values is any number within an interval of numbers.

A) continuous
B) discrete
C) qualitative
D) categorical

Question 25

This stem-and-leaf plot shows the lengths of reigns (in years) of the British monarchs.The shape of this plot is best described as:

A) symmetric.
B) bimodal.
C) negatively skewed.
D) positively skewed.

Question 26

A numerical data set is ___________ if the set of all possible values is finite, or countably infinite.

A) quantitative
B) discrete
C) qualitative
D) categorical

Question 27

Concerning univariate data, a ______________ or ________________ data set consists of observations that are numbers.

A) categorical; qualitative
B) categorical; quantitative
C) numerical; quantitative
D) numerical; qualitative

Question 28

A particular advantage of a stem-and-leaf plot over a histogram or bar chart is that:

A) the stem-and-leaf plot can accommodate large amounts of data.
B) the shape of the stem-and-leaf plot is similar to the bar graph.
C) the actual data values are preserved in the stem-and-leaf plot.
D) the grouping of the data in a stem-and-leaf plot is uniform.