Exam 1

1. Metainformation

   Tag	Value
   file	Probability_uva-random-variables-1301-en_uva-random-variables-1301-en
   name	uva-random-variables-1301-en
   section	Probability/Elementary Probability/Random variables
   type	schoice
   solution	TRUE, FALSE, FALSE, FALSE, FALSE
   Type	Conceptual
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	1.623
   p-value	0.8504

   Question

   Which random variable X is a discrete variable?  I A soccer team plays 12 games in a given season. Suppose X is the number of games that this team won.Ê II A woman buys a lottery ticket every week in which the probability of winning of 1 euro is 1/10. Suppose X is her winnings after one year.Ê. III A student waits for a bus to pass by every ten minutes. Suppose X is the number of minutes he waits at the bus stop.

   
   
   1. TRUE: I and II are discrete variables.
   2. FALSE: I and III are discrete variables.
   3. FALSE: II and III are discrete variables.
   4. FALSE: All of them are discrete variables.
   5. FALSE: None of them are discrete variables.
   
   
   1. I and II are discrete variables…: Correct
   2. I and III are discrete variables…: Incorrect
   3. II and III are discrete variables…: Incorrect
   4. They are all discrete variables…: Incorrect
   5. None of them are discrete variables…: Incorrect