Review Test Submission: Quiz Module 5
Content
Question 1
What must be done to decrease the chances of Type I and Type II errors?
Answers
:
a.
Decrease the number of variables.
b.
Increase the sample size.
c.
Decrease the sample size.
d.
Measure the sample characteristics
Response Feedback:
page 521

Question 2
Which of the following tests is essentially a comparison of means?
Answers
:
a.
Pearson's correlation
b.
t-
test
c.
Chi-square
Response
Feedback:
One of the most common parametric analyses used to test for significant
differences between group means of two samples is the
t-
test. In its
calculation, the numerator is the difference scores of the means of the
two samples. In addition, the test uses the pooled standard deviation of
the two samples as the denominator.
pages 567-571
Question 3
When there is an outlier in the data set, which measure of central tendency is effected
the most?
Answers
:
a.
Median
b.
Mean

c.
Mode
Response Feedback:
page 537
Question 4
Which of the following measures is the most helpful both for providing a quantification
of dispersion and for providing a way to interpret how far away from the mean each
individual score is?
Answers
:
a.
Range
b.
Standard deviation
c.
Difference scores
d.
Magnitude
Response Feedback:
page 540
Question 5
A group of 15 nurses was asked which of two types of coffee they preferred. Seven of
the nurses preferred the first type, while eight of the nurses preferred the second type.

Which statistical test would be appropriate to determine differences in these two groups?
Answers
:
a.
Chi-square
b.
parametric test
c.
paired
t
-test
Response Feedback:
page 576
Question 6
A group of researchers studied functional impairment scores in a group of 10 patients
before and after a new rehabilitation intervention. The researchers set the alpha at 0.05
which meant that the critical
t
value would be 2.26 (9
df
). Data analysis
showed
t

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- Fall '16
- Denise Cauble
- Nursing, Statistics, Statistical hypothesis testing, researcher, Statistical significance