Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Power-814-en_uu-Power-814-en
   name	uu-Power-814-en
   section	Inferential Statistics/NHST/Power
   type	schoice
   solution	FALSE, TRUE, FALSE, FALSE
   Type	Calculation
   Language	English
   Level	Statistical Literacy

   Question

   The teacher of grade 8 at Linden Tree School has had statistics during his training. He conducted an experiment with his students, and now wants to calculate the power of the test. The mean score was 7.5 with a standard deviation $\sigma$ = 2.6. He expects an increase of 1 point (i.e., to 8.5), but assumes that the standard deviation does not change. There are 25 students in his class, all of whom participated. He wants to test at $\alpha$ = .05. What is the power of this test?

   
   
   1. FALSE: 51.6%
   2. TRUE: 61.0%
   3. FALSE: 89.6%
   4. FALSE: 10.4%
   
   
   1. This answer is incorrect.
   2. This answer is correct.
   3. This answer is incorrect.
   4. This answer is incorrect.