The following sample data are from a normal population: 10, 8, 12, 16, 13, 11, 6, 4. a. What is the point estimate of the population mean?

b. What is the point estimate of the population standard deviation (to 3 decimals)?

c. With 95% confidence, what is the margin of error for the estimation of the population mean (to 1 decimal)?

d. What is the 95% confidence interval for the population mean (to 1 decimal)?