Exam 1

1. Metainformation

   Tag	Value
   file	Probability_uva-random-variables-1315-en_uva-random-variables-1315-en
   name	uva-random-variables-1315-en
   section	Probability/Elementary Probability/Random variables
   type	schoice
   solution	TRUE, FALSE, FALSE, FALSE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	-1.611
   p-value	0.9572

   Question

   Suppose we do a probability experiment with a mass production of light bulbs. We take a sample size of 120. Define two chance variables: X is the number of bulbs that are defective, and Y is the burn time per bulb. Which random variable in this probability experiment is a discrete variable?

   
   
   1. TRUE: X is a discrete variable.
   2. FALSE: Y is a discrete variable.
   3. FALSE: X and Y are both discrete variables.
   4. FALSE: X and Y are both not discrete variables.
   
   
   1. X is a discrete variable..: Correct
   2. Y is a discrete variable :: Incorrect
   3. X and Y are both discrete variables…: Incorrect
   4. X and Y are both not discrete variables…: Incorrect