Answer Happy

A national air traffic control system handied an average of 47,689 flights during 29 randomly selected days in a recent year. The standard deviation for this sample is 6,354 flights per day. Complete parts a through c below. a. Construct a 99% confidence interval to estimate the average number of flights per day handied by the system. The 99% confidence interval to estimate the average number of flights per day handled by the system is from a lower limit of to an upper limit of (Round to the nearest whole numbers.)

Suppose a university advertises that its average class size is 37 or less A student organization is concerned that budget cuts have led to increased dass sizes and would like to test this claim. A random sample of 41 classes was selected, and the average class size was found to be 38.7 students. Assume that the standard deviation for class size at the college is 8 students. Using a = 0.01, complete parts a and b below. COM a. Does the student organization have enough evidence to rotuto the college's claim? Determine the null and alternative hypotheses Ho HP N