Sample Size & Power Answers
Question 1
a.
Incorrect – see response option e for how this should be worded. The specific interval from this study is not part of the long-run behavior of the confidence interval.
b.
Correct – this could be a truly null finding or an example of Type II error
c.
Incorrect – the confidence interval includes the null; we are not able to reject the null hypothesis
d.
Incorrect – the confidence interval enables us to assess both precision and significance. Because it crosses the null, the results are not statistically significant.
e.
Correct
f.
Incorrect – statistical significance is not an assessment of bias. Understanding bias requires knowing the study design and procedures.
Question 2
A) True
B) True
C) False
D) True
E) True
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