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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Intermediate Algebra (Subscription)
Authors: Elayn Martin Gay
7th Edition
0134305116, 9780134305110
