Chapter 14, Problem 31SGA

To determine

To find the standard error of the mean for each sample.

Answer to Problem 31SGA

  $1.25$

Explanation of Solution

Given:

  $\sigma =25,N=400$ .

Calculation:

Using the below formula to calculate the standard error of the mean for the given sample-

  $\begin{array}{l}{\sigma }_{\overline{X}}=\frac{\sigma }{\sqrt{N}}\\ {\sigma }_{\overline{X}}=\frac{25}{\sqrt{400}}\\ {\sigma }_{\overline{X}}\approx 1.25\end{array}$