Question

A simple random sample of 64 observations was taken from a large population. the sample mean and the standard deviation were determined to be 320 and 120 respectively. the estimated standard error of the mean is

Answer 1

2110...................

Answer 2

The estimated standard error of the mean is 15

Explanation:

The standard error a sample mean is given by the following formula:

`SE = (s)/(√(n))`

In which s is the standard deviation of the sample and n is the size of the sample.

In this problem, we have that:

`s = 120, n = 64`.

So

`SE = (120)/(√(64)) = 15`

The estimated standard error of the mean is 15