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What is the value of the population mean? What is the best estimate of this value?
The value of the population mean is unknown. However, we have the sample mean to guesstimate it at about 60 pounds.
B. Explain why we need to use the t distribution. What assumption do you need to make?
Given that the standard deviation of the population is unknown, we need to use the t distribution. We need to assume that the population follows normal distribution.
C. For a 90 percent confidence interval, what is the value of t?
For a 90 percent confidence interval, the value of t is 2.131
D. Develop the 90 percent confidence interval for the population mean...
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