Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Width-801-nl_uu-Width-801-nl
   name	uu-Width-801-nl
   section	Inferential Statistics/Confidence Intervals/Width
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Calculation
   Language	Dutch
   Level	Statistical Literacy

   Question

   A psychologist examined the effect of chronic alcohol abuse on memory. In this experiment, a standardized test was used. Higher scores on the test indicate better memory. Scores on this test for the general population form a normal distribution with $\mu = 50$ and $\sigma = 8$. A sample of 22 alcohol abusers has a mean score of $M = 47$. The level of significance is 5%.

   What is the 95% confidence interval for the mean memory score for alcohol abusers?

   
   
   1. FALSE: 47.19 to 52.81
   2. FALSE: 46.66 to 53.34
   3. FALSE: 44.19 to 49.81
   4. TRUE: 43.66 to 50.34