Problem

A population has a mean $\mu=88$ and a standard deviation $\sigma=18$. Find the mean and standard deviation of a sampling distribution of sample means with sample size $n=36$. \[ \mu_{\bar{x}}=\square(\text { Simplify your answer.) } \]

Solution

Step 1 :The mean of a sampling distribution of sample means, often denoted as \(\mu_{\bar{x}}\), is equal to the population mean, \(\mu\). So in this case, \(\mu_{\bar{x}}\) should be 88.

Step 2 :The standard deviation of a sampling distribution of sample means, often denoted as \(\sigma_{\bar{x}}\), is equal to the population standard deviation, \(\sigma\), divided by the square root of the sample size, \(n\). So in this case, \(\sigma_{\bar{x}}\) should be \(\frac{18}{\sqrt{36}}\).

Step 3 :Simplify \(\sigma_{\bar{x}}\) to get the final answer. \(\sigma_{\bar{x}} = \frac{18}{\sqrt{36}} = 3.0\)

Step 4 :Final Answer: The mean of the sampling distribution of sample means is \(\boxed{88}\) and the standard deviation of the sampling distribution of sample means is \(\boxed{3}\).

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Source: https://solvelyapp.com/problems/7571/

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