Question: We sample 54 professors to estimate their average salary. We discover that our sample mean is $64,554 with a standard deviation of $1,210. Calculate intervals

We sample 54 professors to estimate their average salary. We discover that our sample mean is $64,554 with a standard deviation of $1,210. Calculate intervals for the following confidence levels.

55% Confidence Level

85% Confidence Level

90% Confidence Level

99% Confidence Level

Before submitting your study to peer-review, your graduate assistant realize that they accidently switched two values for the standard deviation. Instead of having a standard deviation of $1,210, the actual standard deviation is $2,110. Using the correct standard deviation, re-calculate the intervals for the following confidence levels.

55% Confidence Level

85% Confidence Level

90% Confidence Level

99% Confidence Level

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