Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uva-sample-mean-1372-en_uva-sample-mean-1372-en
   name	uva-sample-mean-1372-en
   section	Inferential Statistics/Sampling Distributions/Sample mean
   type	schoice
   solution	FALSE, FALSE, TRUE, FALSE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	-0.421
   p-value	0.9371

   Question

   30,000 telephone calls from the ICT department have a distribution with a mean duration of 173.9 seconds and a standard deviation of 184.8 seconds. You take 16 random samples, each of 80 calls. What then is the sample mean?

   
   
   1. FALSE: 2.2 seconds
   2. FALSE: 10.9 seconds
   3. TRUE: 173.9 seconds
   4. FALSE: 184.8 seconds
   
   
   1. 2.2 seconds: Incorrect
   2. 10.9 seconds: Incorrect
   3. 173.9 seconds: Correct
   4. 184.8 seconds: Incorrect