Question

13.) The heights (in inches) of males in the United States are believed to be approximately normally

Answer 1

Answer:

Option C) 0.830                                            

Step-by-step explanation:

We are given the following in the question:

The heights (in inches) of males in the United States are believed to be approximately normally   distributed with mean $\mu$.

Sample size, n = 25

Sample mean, $\bar{x}$ = 69.72 inches

Standard deviation, $\sigma$ = 4.15 inches

We have to find the standard error of $\bar{x}$.

Standard error =

$\dfrac{\sigma}{\sqrt{n}} = \dfrac{4.15}{\sqrt{25}} = \dfrac{4.15}{5} = 0.83$

Thus, the standard error of $\bar{x}$ is 0.83 inches.

The correct answer is

Option C) 0.830