9.

Assume that a sample is used to estimate a population mean . Find the margin of error E that corresponds to a sample of size 8 with a mean of 71.1 and a standard deviation of 17.9 at a confidence level of 90%. Report E accurate to one decimal place because the sample statistics are presented with this accuracy. E = Answer should be obtained without any preliminary rounding. However, the critical value to may be rounded to 3 decimal places