Probability Distribution

What are the random variables in the given problem.

• x = 1, 2, 3

• x = 0, 1, 2, 3

• x = 2, 3, 4, 5, 6

• x = 0, 2, 4, 6, 8

What is the probability distribution of getting a sum of 2?

• 0.0625

• 0.6250

• 0.125

• 0.375

What is the probability distribution of getting a sum of 3

• 0.0625

• 0.250

• 0.125

• 0.750

What is the probability distribution of getting a sum of 4

• 0.625

• 0.3125

• 0.375

• 0.850

What is the probability distribution of getting a sum of 5

• 0.50

• 0.75

• 0.125

• 0.25

What is the probability distribution of getting a sum of 6

• 0.50

• 0.75

• 0.125

• 0.25

The probability distribution for the random variable x is shown in the table

• 
• 
• 
• 

The table represents the probability of guessing correct on a 5 question true-false quiz. Find the mean and the standard deviation.

• μ = .4; σ = 7.5

• μ = 2.5; σ = 1.1

• μ = 3; σ = 1.3

• μ = .1; σ = 0

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

The table above shows the number of cell phones per household in a small town. Find the standard deviation. Round to the nearest hundredth.

• 0.80

• 1.70

• 1.30

• 1.00