On a particular day, the wind added 2 miles per hour to jaimes rate when she was rowing with the wind and subtracted 2 miles per hour from her rate on her return trip. jaime found that in the same amount of time she could tow 42 miles with the wind, she could go only 34 miles against the wind. what is her normal rowing speed with no wind

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