Pretest for Probability and Statistics

Which of the following is a DISCRETE random variable?

• the average amount of electricity consumed

• the number of persons eating seafood in a restaurant

• the percentage of the students who passed the exam

• the average weight of female athletes

If a pair of dice is rolled, which is not a possible value of the random variable for the sum of the points on the upturned faces of the dice?

• 1

• 4

• 7

• 11

The following are continuous random variable except ______.

• weight of persons

• height of a person

• income/money

• number of heads in 3 tosses of a fair coin

A function whose value is a real number determined by each element in the sample space – the set of all possible outcomes of an experiment.

• random variable

• probability distribution

• density function

• histogram

A pair of dice is rolled. Let Y be the random variable denoting the sum of the points on the upturned faces of the dice. Find the values of the random variable Y.

• 1, 3, 5, 7, 9 and 11

• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12

• 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12

• 2, 4, 6, 8, 10 and 12