calculate the margin of error.

Find the sample size necessary for a 90% confidence level with maximal error of estimate E=0.3 for the mean price per basket of peaches.

Consider college officials in admissions registration, counseling, financial aid campus ministry, food services, and so on. How much money do these people make each year? suppose you read in your local newspaper that 45 officials in student services in an average of $50,340 each year. Assume that the standard deviation is $10,780 for salaries of college officials and student services. find a 90% confidence interval for the population mean salaries of such personnel.

What is the margin of error