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oee [108]
3 years ago
7

I will give BRAINLIEST , easy question

Mathematics
2 answers:
earnstyle [38]3 years ago
8 0

The answer is the second option which is : - 29

kherson [118]3 years ago
6 0

Answer:

29

Step-by-step explanation:

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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:

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And the standard deviation would be:

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And the best answer would be

b. 2 minutes

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

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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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3 years ago
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Step-by-step explanation:

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What is the answer(FP!)<br> 29/3<br> 5/5<br> 20/10<br> 100/50
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Step-by-step explanation:

hahaha

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2 years ago
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