Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Power-817-en_uu-Power-817-en
   name	uu-Power-817-en
   section	Inferential Statistics/NHST/Power
   type	schoice
   solution	FALSE, FALSE, TRUE, FALSE
   Type	Calculation
   Language	English
   Level	Statistical Literacy

   Question

   A teacher wants to know whether the current group of first-year students is performing better than last year’s freshmen. She does this by comparing the average assignment grade in a randomly drawn sample of current first-year students to the average assignment grade of all students who were first-year students last year (here, the average assignment grade is $\sigma$ = 0.8). What is the smallest sample size where the teacher with a power of at least 85% and a $\alpha$ of 1% can note an improvement of 0.2 over last year?

   
   
   1. FALSE: 85
   2. FALSE: 180
   3. TRUE: 190
   4. FALSE: 215
   
   
   1. This answer is incorrect.
   2. This answer is incorrect.
   3. This answer is correct.
   4. This answer is incorrect.