Calculate the variance of the following set of values.

A set of five numbers is given as follows, where one of the numbers, , is unknown:

If the mean of the set is , what is the variance?

What is the variance for the values , , and ?

Evaluate the variance if the standard deviation is .

Determine the population variance given the following data set:

Determine the variance if the standard deviation is .

The standard deviation of a distribution is 9. What is the variance?

What is the variance of the following set of numbers?