Mean and Variance of Random Variables

The mean μ of a discrete random variable is the _________ or average of its corresponding probability mass function.

• Central Value

• First Value

• Last Value

• Second Value

It is described as how scattered or spread out the scores are from the mean value of the random variable.

• Mean

• Standard Deviation

• Variance

• Average

It is described as how scattered or spread out the scores from the other.

• Mean

• Standard Deviation

• Variance

• Average

It can be obtained by simply getting the square root of the variance.

• Mean

• Standard Deviation

• Variance

• Average

Find the mean of the probability distribution

Find the mean of the probability distribution

Find the mean of the probability distribution

Compute the variance

Compute the standard deviation

Compute the standard deviation