Question 1

In a research article, you find that r is reported to be
4.8. How would you interpret this finding?

The relationship is reported incorrectly

The relationship is strong

The relationship is moderate

The relationship is weak

Question 2 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 3 The strength of a correlation between two
variables is represented by the distance the value is between -1 and 1.0. Which of the following
correlations is the strongest?

-.92

.50

.75

.90

Question 4 Many researchers become excited when they
identify statistically significant relationships between variables and may
interpret this to mean that the relationship is very important. However, when
the percentage of variance explained is calculated, the picture becomes less
rosy. Which of the following is true about the percentage of variance
explained?

All of the above

It is calculated by squaring the r value

The obtained value will be lower than the r value unless
there is a perfect correlation

A correlation of .40 would explain only 16% of variance,
leaving 84% unexplained

Question 5 Which is an important research precept?

Correlation does not prove causation

Causation does not prove a correlation

Evidence can prove that hypotheses are correct

Evidence can prove that hypotheses are incorrect.

Question 6 In a study examining the relationship between a
participant's age and number of friends, a Pearson r = -.62 was computed. Which of the following best describes this
finding?

As age increases the number of friends decreases

As age increases, the number of friends increase

As age decreases, the number of friends decreases

As age increases, the number of friends stays the same.

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 A nurse researcher wants to describe the
relationship between clients' age and their scores on a 20 item social support
scale. Which of the following would the researcher use to present the results
of the analysis graphically?

A scatter plot

A crosstabs table

A correlation matrix

A histogram

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- self-efficacy and social support, to self management in individuals
with epilepsy".

Correlational research

Descriptive research

Case control design retrospective study

Prospective research

Question 11 What does descriptive research attempt to
summarize?

The status of a phenomena

The frequency of a specific event

The effect of a random event

Differences in group membership

Question 12 The _______ hypothesis states that the means of
the groups are ______

Null; equal

Null; not equal

Research; equal

Alternative; equal

Question 13 Which of the statements below defines a Type II
error?

When you accept a null hypothesis when it is false

When you reject a research hypothesis when it is false

When you accept a research hypothesis which is true

When you accept a null hypothesis when it is true

Question 14 If the
null hypothesis was rejected and there was only 1 chance out of 100 that the
decision was wrong, what was the alpha level in the study?

.01

.05

.10

.001

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