q1-A random sample of 50 students has mean earnings of 3350 and standard deviation 673.Find margin o

q1-A random sample of 50 students has mean earnings of 3350 and standard deviation 673.Find margin of error if c=0.95q2-A sample of 63 students yield a mean income of 3287.standard deviation =972.Determine the margin of error in estimating the population mean at 95% confidence