Types of Random Variables

• A
• B
• C
• E

• A
• B
• D
• E

• A
• B
• C
• D

• A
• C
• D
• E

The table represents the probability of guessing correct on a 5 question true-false quiz.  Find the probability for at least 4 questions correct.

• .03125
• .15625
• .3125
• .1875

Classify: The numbers of cheeseburgers a fast-food restaurant serves each day

• None of these
• Abstract
• Continuous
• Discrete

Which one of these variables is a continuous random variable?

• The time it takes a randomly selected student to complete an exam.
• The number of tattoos a randomly selected person has.
• The number of women taller than 68 inches in a random sample of 5 women. 
• The number of correct guesses on a multiple choice test. 

Find the mean of the probability distribution shown in the image.

• 11.61
• 1.30
• 1.14
• 12

Find the standard deviation of the probability distribution shown in the image.

• 11.61
• 1.30
• 1.14
• 12

An algebra 2 test has 6 multiple choice questions with four choices with one correct answer each. If we just randomly guess on each of the 6 questions, what is the probability that you get exactly 3 questions correct?

• 0.962

• 0.132

• 0.831

• 0.250