Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Power-840-en_uu-Power-840-en
   name	uu-Power-840-en
   section	Inferential Statistics/NHST/Power
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Conceptual Case
   Program
   Language	English
   Level	Statistical Literacy

   Question

   A toy manufacturer asks a developmental psychologist to test children’s reactions to a new product (toy). The test used gives the children’s reactions scores between 0 and 10. The hypotheses he wants to test are H0: $\mu$ = 5 vs. H1: $\mu$ > 5. The psychologist calculates the power of test 1. Test 1 uses a sample of 50 children. He chooses a significance level of $\alpha$ = 0.05 and an increase of 2 points is expected. If he is going to calculate the power for test 2, using a sample of 100 children with $\alpha$ = 0.01, what happens to the power?

   
   
   1. FALSE: Power goes up
   2. FALSE: Power stays the same
   3. FALSE: Power goes down
   4. TRUE: We cannot tell from the information given
   
   
   1. This answer is incorrect.
   2. This answer is incorrect.
   3. This answer is incorrect.
   4. This answer is correct.