Question 1 Which of the following is true about
correlational analyses?
All of the data should come from a single population
Data must be measured at the ratio level for these analyses
to be valid
The range of values should be truncated or shortened in
order for these statistical procedures to work
Data from groups that are different in some way are preferred
in these analyses
Question 2 The most common purpose for a Pearson's
correlation is to examine:
Relationships between two variables
Relationships among groups
Differences between variables
Differences between two or more groups
Question 3 A correlation coefficient of 0.40 could be
considered:
Moderate
Zero
Weak
Strong
Question 4 A square correlation table or matrix presenting
Pearson's product moment correlation coefficients is presented in a research
article. Only the upper right triangle of the table is filled in. Is this a
problem for the reader?
No, the upper right triangle of the table is a mirror image
of the lower left triangle
Yes, the reader has no way of knowing what the relationships
are
Yes, it is very hard to read a table that is only half
complete
Yes, valuable data is missing
Question 5 Pearson's productmoment correlation coefficients
are represented in printouts and articles by which of the following letters?
r
F
R
x
Question 6 Below is a correlation matrix for four variables
(A, B, C, D). Which value in the matrix indicates the strongest relationship
A

B

C

D


A





B

.62




C

.59

.45



D

.65

.52

.27


Question 7 What would a scatter plot look like for a perfect
positive relationship?
A diagonal line from lower left to upper right
A diagonal line from upper left to lower right
A straight line near the mean of variable 1
A straight line near the mean of variable 2
Question 8 Scatterplots are often used to display data in
relationship studies. Which of the following is true?
Scatterplots can identify curvilinear relationships
Scatterplots are only useful in identifying linear
relationships
More than two variables can be easily shown on a scatterplot
Differences in data from two different populations would not
show up on a scatterplot
Question 9 Match the following statistical tests with the
level of measurement or other
requirement required for each analysis.
Pearson r
Spearman 's Rank Order (rho)
Kendall's Tau
Chi Square
Question 10 Match the purpose of the study with the
appropriate research design below.
"The purpose of this study was to examine the relationship of two
factors selfefficacy and social support, to self management in individuals
with epilepsy".
Correlational research
Descriptive research
Case control design retrospective study
Prospective research
Question 11 What is a
central feature of nonexperimental research?
The researcher does not manipulate the independent variable
The researcher manipulates the dependent variable.
Data are collected through the observation of participants'
behaviors.
The strength lies in their ability to elucidate
causeandeffect relationships.
Question 12 The
_______ hypothesis states that the means of the groups are ______
Null; equal
Null; not equal
Research; equal
Alternative; equal
Question 13 A Type I error occurs when:
The results indicate a statistically significant difference,
when in reality, there is no significant difference
The results are not statistically significant
The wrong statistical procedures are used
The data were not measure at the interval level
Question 14 What is
the best way to decrease the chance of a
Type II error?
Increase sample size
Increase level of measurement of variable
Lowering effect size
Increase significance level (alpha)
Question 15 A Type I error occurs when the null hypothesis
is
Rejected and the null hypothesis is true
Accepted and the null hypothesis is false
Accepted and the null hypothesis is actually true
Rejected and the null hypothesis is not true