Question 1

What is the median for the following set of scores: 18, 6, 12, 10, 14?

Accepted Answer

A)   10
B)   14
C)   18
D)   12 D

Question 2

The _is the value you calculate when you want the arithmetic average.

Accepted Answer

A)   mean
B)   median
C)   mode
D)   all of the above A

Question 3

A post-hoc test is:

Accepted Answer

A)   a test to compare two or more means in an overall test.
B)   a test to determine regression to the mean.
C)   a follow-up test to ANOVA when there are three or more groups.
D)   a follow-up test to the independent t-test. C

Question 4

If a distribution is skewed to the left, then it is ______.

Accepted Answer

A)   negatively skewed
B)   positively skewed
C)   symmetrically skewed
D)   symmetrical

Question 5

A statistical test used to compare two or more groups is called:

Accepted Answer

A)   simple regression.
B)   post-hoc test.
C)   t-test for regression.
D)   one-way ANOVA.

Question 6

The purpose of ____is to summarize and explain a specific set of data.

Accepted Answer

A)   descriptive statistics
B)   inferential statistics
C)   parametric procedures
D)   nonparametric procedures

Question 7

The standard deviation is:

Accepted Answer

A)   the square root of the variance.
B)   a measure of variability.
C)   an approximate indicator how numbers vary from the mean.
D)   all of the above

Question 8

Which of the following represents the fiftieth percentile, or midpoint of a distribution?

Accepted Answer

A)   mean
B)   median
C)   mode
D)   variance

Question 9

How many dependent variables are used in simple linear regression?

Accepted Answer

A)   one
B)   two
C)   two or more
D)   three

Question 10

_is the set of procedures used to explain or predict the values of a dependent variable based on values of one or more independent variables.

Accepted Answer

A)   Regression analysis
B)   Regression coefficient
C)   Regression equation
D)   Regression line

Exam 10: Analyzing Data