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We wish to create a 92% confidence interval for the mean given that the standard deviation...

We wish to create a 92% confidence interval for the mean given that the standard deviation is known to be 34.4. A sample of 34 gives an average of 190. Find the upper value for the confidence interval. Round to tenths.

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Answer #1

The in question the population standard deviation is given that is . So, the formula for confidence interval is given by -

Given:

sample size, , sample mean,

Calculation for upper value of 92% confidence interval:

for 92% confidence interval,

Upper value of confidence is given by-

So, the upper value of a 92% confidence interval is 200.3

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