You take a sample of 22 from a population of test scores. The mean of your sample is 60 and the population standard deviation is 10.

- What is the point estimate for the population mean?
- what is the 99% confidence interval for the population mean?
- Assume you do not know the population standard deviation, but you do know the sample standard deviation is 10. What is the new 99% confidence interval on the mean?
- What distribution did you use when computing question #2?
- What was the appropriate degrees of freedom required for calculating the confidence interval for question #2?
- What distribution did you use when computing question #3?
- What was the appropriate degrees of freedom required for calculating the confidence interval for question #3?

(it)You how the standard deviation ofthepopulaticn is 10. IWhat is them conﬁdence interval onthe pcptﬂation mean. For the given (him, we have n =22,,u=60, and 6:10 Since, a is known, we used…