Exam 1

1. Metainformation

   Tag	Value
   file	Distributions_uva-normal-1334-en_uva-normal-1334-en
   name	uva-normal-1334-en
   section	Distributions/Continuous/Normal
   type	schoice
   solution	FALSE, FALSE, FALSE, TRUE, FALSE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	2.53
   p-value	0.4636

   Question

   The distribution of the number of children per family in the U.S. has a mean of 0.9 and a standard deviation of 1.1. If you take a random sample of 20 families in the U.S., what is the probability that there are a total of 15 or more children in the sample? (z is normally distributed by default).

   
   
   1. FALSE: P(z ≤ 0.86)
   2. FALSE: P(z ≤ -0.86)
   3. FALSE: 1- P(z ≥ -0.86)
   4. TRUE: 1- P((z ≤ -0.86)
   5. FALSE: 1- P(z ≤ 15)
   
   
   1. P(z ≤ 0.86): Incorrect
   2. P(z ≤ -0.86): Incorrect
   3. 1- P(z ≥ -0.86): Incorrect
   4. 1- P((z ≤ -0.86): Correct
   5. 1- P (z ≤ 15): Incorrect