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

distributed with mean u. The mean height of a random sample of 25 adult American males is found to

be x = 69.72 inches and the standard deviation is 4.15 inches. What is the standard error of x?

a) 0.170

b) 0.690

c) 0.830

d) 1.836

e) 2.040

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 .

Sample size, n = 25

Sample mean, = 69.72 inches

Standard deviation, = 4.15 inches

We have to find the standard error of .

Standard error =

Thus, the standard error of is 0.83 inches.

The correct answer is

Option C) 0.830

answer: d. $20

step-by-step explanation:

just took the test

thats not a system of equations, that is a solution