two customers ordered the same shade of purple paint at a hardware store. The amount of blue paint, in ounces, , and the amount of red paint, in ounces, , needed for each order is shown in the table below.

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean