Statistics Quizzes and Exams

Tests and Quizzes for Statistics
Quiz #1
Question 1 of 20
0.0/ 1.0 Points
If a variable has possible values –2, 6, and 17, then this variable is

A.a discrete variable

B.a continuous variable

C.neither a continuous nor a discrete variable

D.both a continuous and a discrete variable

Answer Key: A

Question 2 of 20
1.0/ 1.0 Points
Which of the following statistics is not a measure of central location?

A.Median

B.Mode

C.Interquartile range

D.Mean

Answer Key: C

Question 3 of 20
0.0/ 1.0 Points
Boxplots are most useful for.

A.comparing two populations graphically

B.calculating the mean of the data

C.comparing the mean to the median

D.calculating the median of the data

Answer Key: A

Question 4 of 20
0.0/ 1.0 Points
A variable is classified as ordinal if:

A.there is a natural ordering of categories

B.the data arise from continuous measurements

C.we track the variable through a period of time

D.there is no natural ordering of categories

Answer Key: A

Question 5 of 20
0.0/ 1.0 Points
If a value represents the 95th percentile, this means that

A.95% of the time you will observe this value

B.there is a 5% chance that this value is incorrect

C.95% of all values are above this value

D.95% of all values are below this value

Answer Key: D

Question 6 of 20
1.0/ 1.0 Points
An advertisement for a car states that it is 10% more powerful than its competitor. This is an example of

A.detached statistics

B.ambiguous averages

C.suspect samples

D.changing the subject

Answer Key: A

Question 7 of 20
0.0/ 1.0 Points
Which of the following are the two most commonly used measures of variability?

A.Range and interquartile range

B.Mean and variance

C.Variance and median

D.Variance and standard deviation

Answer Key: D

Question 8 of 20
1.0/ 1.0 Points
Numerical variables can be subdivided into which two types?

A.Cross-sectional and discrete

B.Nominal and progressive