Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Power-821-en_uu-Power-821-en
   name	uu-Power-821-en
   section	Inferential Statistics/NHST/Power
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy

   Question

   A researcher examines the relationship between motivation at work and sick leave. He finds a correlation of r = .28 with df = 28. He presents the results as follows: “There was no significant correlation between motivation at work and sick leave.” A second researcher finds a correlation of r = .26 with df = 80. She presents the following: “There was a small but significant correlation between motivation at work and sick leave.”

   Both tested at 5%.

   How is this possible?

   
   
   1. FALSE: The first researcher had a larger $\alpha$ should use.
   2. FALSE: The first investigator made a type I error.
   3. FALSE: The second investigator has lower power.
   4. TRUE: The second investigator has higher power.
   
   
   1. This answer is incorrect.
   2. This answer is incorrect.
   3. This answer is incorrect.
   4. This answer is correct.