Answer Happy

A study found that highway drivers in ono state traveled at an average speed of 573 miles per hour (MPH) Assume the population standard deviation is 59 MPH Comploto parts a through d below a. What is the probability that a sample of 30 of the chvers will have a sample mean less than 56 MPH P(x+56) = (Round to four decimal places as nooded) b. What is the probability that a sample of 40 of the drivers will have a sample moan less than 56 MPH? P(x<56) - (Round to four decimal places as needed c. What is the probability that a sample of 50 of the drivers will have a sample mean less than 56 MPH? P(*<58) - (Round to four docimal places as needed) d. Explain the difference in these probabilities As the sample size increases the standard error of the mean and the sample means 573 MPH Therefore, the probability of observing a samplo moan less than 56 MPH the population mean of