Question 1

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

Accepted Answer

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

Question 2

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

Accepted Answer

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

Question 3

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?

Accepted Answer

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

Question 4

A distribution with only one peak is called:

Accepted Answer

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

Question 5

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 6

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?

Accepted Answer

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 7

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 8

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

Accepted Answer

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

Exam 3: Tables and Graphs for Summarizing Data