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Stolb23 [73]
3 years ago
8

In a manufacturing process, a machine produces bolts that have an average length of 5 inches with a variance of .08. If we rando

mly select five bolts from this process, what is the standard deviation of the sampling distribution of the sample mean
Mathematics
1 answer:
xz_007 [3.2K]3 years ago
4 0

Answer:

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

And replacing:

\mu_{\bar X}= 5

And the deviation:

\sigma_{\bar X}= \frac{0.283}{\sqrt{5}}= 0.126

And the distribution is given:

\bar X \sim N(\mu= 0.08, \sigma= 0.126)

Step-by-step explanation:

For this case we have the following info given :

\mu= 5. \sigma^2 =0.08

And the deviation would be \sigma = \sqrt{0.08}= 0.283

For this case we select a sample size of n = 5 and the distirbution for the sample mean would be:

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

And replacing:

\mu_{\bar X}= 5

And the deviation:

\sigma_{\bar X}= \frac{0.283}{\sqrt{5}}= 0.126

And the distribution is given:

\bar X \sim N(\mu= 0.08, \sigma= 0.126)

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