, , , , ,

Rewrite as .

Pull terms out from under the radical, assuming positive real numbers.

The mean of a set of numbers is the sum divided by the number of terms.

Add and .

Add and .

Subtract from .

Add and .

Add and .

Factor out of .

Cancel the common factors.

Factor out of .

Cancel the common factor.

Rewrite the expression.

Divide.

The mean should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.

Find the Mean (Arithmetic) 2 , square root of 9 , 5 , -1 , 2 , 5