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VikaD [51]
2 years ago
15

Solve:

Mathematics
1 answer:
kodGreya [7K]2 years ago
8 0

I did the calculations and he walks 13 miles a day.

Explanation: So we just write in this form:

1 × 52 divided by 4 which gives the answer 13 miles.

____________________________

Hope this helps

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Step-by-step explanation:

Previous concepts

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Solution to the problem

For this case we have the following info related to the time to prepare a return

\mu =90 , \sigma =14

And we select a sample size =49>30 and we are interested in determine the standard deviation for the sample mean. From the central limit theorem we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And the standard deviation would be:

\sigma_{\bar X} =\frac{14}{\sqrt{49}}= 2

And the best answer would be

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