Probability Discrete and Continuous Random Variables

Is this a probability distribution?

• No, the sum of p(x) does not equal 1.

• Yes, all p(x) are between 0 and 1.

• No, all p(x) are not between 0 and 1.

• Yes, the sum p(x) is 1.

Find P( X = 4).

• 1.00

• 0.91

• 0.02

• 0.07

Is the number of cheeseburgers a fast-food restaurant serves each day discrete or continuous?

• Discrete

• Continuous

Is the number of orange Skittles in a bag discrete or continuous data?

• Discrete

• Continuous

Find the missing value for P(X=5) in the probability ditribution:

• 0.11

• 0.21

• 0.01

• 0.31

Determine which of the following distribution is NOT a probability distribution.

• A

• B

• C

• D

The table represents the probability of guessing correct on a 5 question true-false quiz. Find the probability all 5 questions correct.

• .03125

• .15625

• .3125

• .1875

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

What does P(Y<3) mean?

• The probability that the random variable Y is greater than 3.

• The probability that the random variable Y is less than 3.

• The probability that the random variable X is greater than 3.

• The probability that the random variable X is less than 3.

What is P( X > 2).

• 0.02

• 0.2

• 0.01

• 0.1