Question

The standard deviation of a population is known to be 7.8. If the sample size is 85, what is the standard error of the mean?

a. 0.22
b. 0.85
c. 1.047
d. 6.008

Answer 1

0.85. My be this is the answer

Answer 2

Answer: b. 0.85

Explanation:

The formula to calculate the standard error is given by :-

`S.E.=(\sigma)/(√(n))`

We are given that the standard deviation of a population :
`\sigma = 7.8`

The sample size = 85

Therefore. the standard error of the mean is given by :-

`S.E.=(7.8)/(√(85))=0.846028785493\approx0.85`

Hence, the standard error of the mean = 0.85