Exam 1

1. Metainformation

   Tag	Value
   file	Distributions_uva-central-limit-theorem-1284-en_uva-central-limit-theorem-1284-en
   name	uva-central-limit-theorem-1284-en
   section	Distributions/Limit Theorems/Central Limit Theorem
   type	schoice
   solution	FALSE, FALSE, TRUE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	3
   p-value	0.311

   Question

   To fix a microwave oven you need time X. The distribution of the random variable X has a mean of 1 hour with a standard deviation of 1 hour. Your company has 80 such microwaves. What then is the probability that the average repair job takes longer than 50 minutes if z is normally distributed by default?

   
   
   1. FALSE: P(z = -1.55)
   2. FALSE: P(z < -1,55)
   3. TRUE: 1 - P(z < -1.55)
   
   
   1. P(z = -1.55): Incorrect
   2. P(z < -1.55) Incorrect
   3. 1 - P(z < -1.55) Correct