Exam 1

1. Metainformation

   Tag	Value
   file	Descriptive-statistics_uva-variance-298-en_uva-variance-298-en
   name	uva-variance-298-en
   section	Descriptive statistics/Summary Statistics/Measures of Spread/Variance
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	4.448
   p-value	0.0248

   Question

   If I make 4 independent draws from a normal distribution with expectation 20 and variance 64, then the mean of these 4 draws will have as its distribution:

   
   
   1. FALSE: N(0, 1)
   2. FALSE: N(5, 22)
   3. FALSE: N(20, 22)
   4. TRUE: N(20, 42)
   
   
   1. N(0, 1): Incorrect
   2. N(5, 22): Incorrect
   3. N(20, 22): Incorrect
   4. N(20, 42): Correct