Random Variable Mean

In a certain community, 30% of households have 1 child, 43% have 2 children, and 27% have 3 children. If a household is selected at random, what is the expected number of children in that household? HINT: A Probability table may be helpful.

• 2.00

• 2.13

• 1.97

• 1.27

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

• 31.8

• 15.68

• 0.20

• 1.00

Find the mean (expected value) of the probability distribution. (HINT: use calculator)

• 85

• 83.2

• 87.1

• 84.4

Find the value of q

• 0.85

• 0.15

• 0.25

• 0.05

Find the value of p

• 0.9

• 0.1

• 0.3

• 0.15

It is a numerical quantity that is assigned to the outcome of an experiment.

• Statistics

• Probability

• Random Variable

• Distribution

TRUE or FALSE: The standard normal distribution of a random variable is a normal distribution with mean =0 and standard deviation =1.

• TRUE

• FALSE

It is a variable whose value is determined by the outcome of a random experiment.

Find the mean of the probability distribution

Find the mean of the probability distribution