The IV is sex (men vs. women); the DV is compliance vs. noncompliance with a
medication regimen
The IV is infant birthweight (low birthweight vs. normal birthweight); the DV is
number of days absent from school in first grade

10 points
QUESTION 5
For which of the following situations is the dependent groups t-test
(paired t-test) appropriate?

10 points
QUESTION 6
Suppose we wanted to test the hypothesis that a control group of
cancer patients (Group 1) would report higher mean pain ratings than
an experimental group receiving special massage treatments (Group 2).
Assume that the pooled SD for the two groups is 6.39. Calculate the
value of d (effect size).
o
M1 = 78.5 SD
1
2
= 42.1 n1 =25
o
M2 = 72.1 SD
2
2
= 39.7 n2 =25
(Keep 2 decimal places)

10 points
QUESTION 7
An effect size of 1.00 is considered...

10 points
QUESTION 8
For a post hoc power analysis, d = .60, α = .05 for a two-tailed t test, and
the number of people in each of two groups = 30, the power of the t-
test is approximately 0.61.
What was the risk of a Type II error?
6 points
QUESTION 9
For a post hoc power analysis, d = .60, α = .05 for a two-tailed t test, and
the number of people in each of two groups = 30, the power of the t-
test is approximately 0.61.
Approximately what n per group would be needed to achieve power =
0.80? (Hint: table B1)
10 points
QUESTION 10

t
= 2.40,
df
= 25,
α
= .01
The
t
is statistically significant for a two-tailed test, at the specified alpha

10 points
QUESTION 11
t = 2.40, df = 25, α = .05
The t is statistically significant for a two-tailed test, at the
specified alpha
2.
True
3.
False