Mathematics: 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

The standard deviation of a population is known

Tooey2331

12.03.2022

b. 0.85

Step-by-step explanation:

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

$S.E.=\dfrac{\sigma}{\sqrt{n}}$

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 :-

$S.E.=\dfrac{7.8}{\sqrt{85}}=0.846028785493\approx0.85$

Hence, the standard error of the mean = 0.85

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smolemily

02.01.2022

I can't tell what the numbers are on the first one but you got the second one right, and the last one would be different it would be 24 I believe.

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