Discrete Probability and Expected Values

The table above shows a television station's advertisement sales. The distribution of sales for one 24-hour day is given. Solve for the standard deviation. Round to the nearest hundredth.

• 45.81

• 266.2

• 16.30

• 0.20

What is the numerical quantity assigned to the outcome of an experiment usually denoted by an uppercase letter such as X?

• Frequency

• Probability

• Random variable

• Sample

If two coins are tossed, which is NOT a possible value of the random variable for the number of heads?

• 0

• 1

• 2

• 3

Which of the following is NOT true for any discrete random variable X?

• It can be described by a formula.

• It is the listing of the possible samples and the corresponding mean.

Using the probability distribution, find P(X > 1).

What formula describes the probability distribution?

Given the probability distribution, what is P(X < 1)?

How many possible outcomes will appear if you roll a common dice?

• 1

• 6

• 12

• 36

• Yes

• No

• Maybe

• Cannot be determined

Choose an American household at random. What is the expected number of cars for that household?

• 1.75

• 1.84

• 2.00

• 2.50