20.0 Points

Question 1 of 20

1.0 Points

If a variable has possible values –2, 6, and 17, then this variable is A. both a

continuous

and a

discrete

variable

B. a

continuous

variable

C. neither a

continuous

nor a discrete

variable

D. a discrete

variable

Answer Key: D

1.0 Points

Question 2 of 20

Which of the following correctly describes the relationship between a sample and a population? A. A population and a

sample are not

related.

B. A sample is a

group of subjects

selected from a

population to be

studied.

C. A sample is a

group of populations

that are subject to

observation.

D. A population is a

group of samples that

may or may not be

included in a study

Answer Key: B

Question 3 of 20

1.0 Points

What is the term for a characteristic or attribute that can assume different values? A.

expo

nent

B.

datu

m

C.

sam

ple

D.

varia

ble

Answer Key: D

Question 4 of 20

1.0 Points

If you classified the fruit in a basket as apple, orange, or banana, this would be an example of which level of measurement?

A.

ordi

nal

B.

ratio

C.

nom

inal

D.

inter

val

Answer Key: C

Question 5 of 20

1.0 Points

The amount of time needed to run the Boston marathon is an example of which type of variable?

A.

contin

uous

B.

discret

e

C.

qualita

tive

D.

none

of the

above

Answer Key: A

1.0 Points

Question 6 of 20

An advertisement for a car states that it is 10% more powerful than its competitor. This is an example of

A.

ambigu

ous

average

s

B.

suspect

sample

s

C.

changin

g the

subject

D.

detache

d

statistic

s

Answer Key: D

Question 7 of 20

1.0 Points

What type of sampling is being employed if the population is divided into economic classes and a sample is chosen from each economic class to be surveyed?

A.

cluster

samplin

g

B.

random

samplin

g

C.

systema

tic

samplin

g

D.

stratifie

d

samplin

g

Answer Key: D

1.0 Points

Question 8 of 20

A pareto chart does NOT have which of the following properties? A. It is a bar

chart

B. The

frequencies are

arranged from

highest to

lowest

C. The

frequencies are

arranged from

lowest to

highest

D. It is used to

represent

categorical data

Answer Key: C

1.0 Points

Question 9 of 20

The total frequency of the data whose ogive is shown below is approximately

A.

12

B.

18

C.

34

D.

90

Answer Key: C

1.0 Points

Question 10 of 20

A scatter plot would be useful for

A. Showing the

relative number of

sales of four different

brands of blank

DVDs

B. Showing the trend

of sales, over time, of

five different brands

of blank DVDs

C. Showing the

relationship between

the sales of blank

CDs and blank DVDs

D. Showing the top

selling brands of

blank DVDs

Answer Key: C

1.0 Points

Question 11 of 20

What kind of relationship between x and y is demonstrated by the scatter plot below?

A. A

positive

linear

relationsh

ip

B. A

negative

linear

relationsh

ip

C. No

linear

relationsh

ip

D. This is

not a

scatter

plot

Answer Key: B

1.0 Points

Question 12 of 20

Which of the following could be a cumulative frequency graph? A.

B.

C.

D.

Answer Key: B

1.0 Points

Question 13 of 20

What type of graph is the figure below?

A. Pareto

chart

B.

pictograp

h

C. ogive

D.

relative

frequency

histogram

Answer Key: A

Question 14 of 20

1.0 Points

CEOSalaries.xls 14 KB

The following data are the base salaries, in thousands of dollars, of 50 chief executive officers for a sample of companies doing business with the state of Connecticut. That is, the first entry in the table below corresponds to a salary of $125,000. A copy of this data set can be found in the Excel Workbook called CEOSalaries.xls. Use these data to answer questions 14 through 17. 125

157

113

127

201

165

145

119

148

158

148

168

117

105

136

136

125

148

108

178

179

191

225...