Summative Test No. 2 Q3

The sample space of rolling a die and tossing a coin simultaneously.

• S={IT,2T,3T,4H,5H,6H,}

• S = {IH,2H3H,AT,5T,6T}

• S = {IH,IT,2H,2T,3H,3T,4H,4T,5H,5T,6H,6T}

• S = {1H,2T,3H,4T,5H,6T}

Which of the following is a discrete random variable?

• the average amount of electricity consumed

• the average weight of female athletes

• the percentage of the students who passed the exam

• the number of persons eating seafood in a restaurant

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.

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

• 1, 3, 5, 7, 9 and 11

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

• 2, 4, 6, 8, 10 and 12

The following are continuous random variable EXCEPT

• number of heads in 3 tosses of a fair coin

• height of a person

• income/money

• weight of persons

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

Which formula gives the probability distribution shown in the table at the right?

Four coins are tossed. Let Y be the random variable representing the number of heads that occur. The probability distribution of the random variable Y is __________.

• 
• 
• 
• 

• 1, 1, 2

• 2, 3, 4

• 0, 2, 3

• 1, 2, 3

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

What makes the distribution below a probability distribution?

• The random variable is equally distributed.

• The values of the probability distribution are probabilities.