Question

1. A sample of n = 9 scores has ex = 108. What is the sample mean?

Answer 1

The value of the sample mean is 12.

Given

A sample with a mean of n = 9 has $\rm \sum x=108$.

What is formula is used to calculate the sample mean?

The formula is used to calculate sample mean is;

$\rm Sample \ mean = \dfrac{\sum x}{n}$

Substitute all the values in the formula

Then,

The sample mean is;

$\rm Sample \ mean = \dfrac{\sum x}{n}\\\\\rm Sample \ mean = \dfrac{108}{9}\\\\ \rm Sample \ mean = 12$

Hence, the value of the sample mean is 12.

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