Question 1

Concerning numeric data,a negatively skewed distribution has:

Accepted Answer

A)   most of the data concentrated in the lower values with relatively fewer larger values.
B)   most of the data concentrated in the higher values with relatively fewer lower values.
C)   a positive amount of values skewed across the center.
D)   an equal amount of large and small values. B

Question 2

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

Accepted Answer

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

Question 3

A data set consisting of two observations on each individual subject is a _____ data set.

Accepted Answer

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

Question 4

A 2012 survey examined cell phone ownership by U.S.adults.The results of the survey are shown in the pie chart below.  What percentage of the adults surveyed did NOT own a smartphone?

Accepted Answer

A)   13%
B)   45.9%
C)   41%
D)   54%

Question 5

A survey records the average study time spent each week by students at a large university.What type of data are these?

Accepted Answer

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

Question 6

A frequency distribution table is BEST suited to summarize which type of data?

Accepted Answer

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

Question 7

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

Accepted Answer

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

Question 8

When two distinct symmetric unimodal populations with different centers are mixed,the resulting distribution will likely be:

Accepted Answer

A)   unimodal.
B)   quasimodal.
C)   bimodal.
D)   skewed.

Question 9

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

Accepted Answer

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

Question 10

A data set consisting of observations on only a single characteristic,or attribute,is a _____ data set.

Accepted Answer

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

Question 11

A distribution with only one peak is called:

Accepted Answer

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

Question 12

In order 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 in seconds.What type of data are these?

Accepted Answer

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

Question 13

Bic corporation performs routine quality control testing on its lighters.Each lighter tested is struck and the trial is recorded as either a success (the lighter ignites)or a failure (the lighter does not ignite).This is an example of what kind of data?

Accepted Answer

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

Question 14

A survey of the patients waiting to be seen in an emergency room recorded the mode of arrival,the waiting time,whether or not the patient is insured,and the blood type of the patients.This would result in what type of data set?

Accepted Answer

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

Question 15

In a study of the effectiveness of a drug that is designed to reduce blood pressure,each individual participant has their blood pressure recorded in millimeters of mercury before and after taking the drug.Of what type is the data in this study?

Accepted Answer

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

Question 16

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

Accepted Answer

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

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?

Accepted Answer

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

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

Accepted Answer

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

Question 19

A cardiologist is studying the effects of soothing music on a person's heart rate.He records his patient's at-rest heart rate in whole beats per minute before and after they listen to soothing music.The variable "heart rate" in this study is BEST described as:

Accepted Answer

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

Question 20

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

Accepted Answer

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

Exam 3: Tables and Graphs for Summarizing Data