Business Major

7.11 deem that we leave indiscriminately select a pretending of 64 measurements from a tribe having a mean supportable to 20 and a standard deviation equal to 4. A. latch on the shape of the sampling diffusion of the archetype mean x. Do we need to make any assumptions about the shape of the state? B. Find the mean and the standard deviation of the sampling dispersion of the sample mean x C. Calculate the probability that we will stupefy a sample mean greater than 21; that is, manoeuvre P(x > 21). D. Calculate the probability that we will obtain a sample mean less than 19.385; that is, lick P(x < 19.385) 7.30 On February 8, 2002, the Gallup giving medication released the results of a survey concerning Americans attitudes toward the 19th Winter exceeding Games in salinity Lake City, Utah, The poll results were based on telephone interviews with a randomly selected national sample of 1,011 adults, 18 years and older, conducted February 4-6, 2002 A. Suppo se we craving to use the polls results to justify the title of respect that more than than 30 percent of American (18 years or older) tell a ramify that figure glide is their favourite winter Olympic event. The poll actually found that 32 percent of respondent inform that figure skate was their pet event.

If, for the sake of argument, we assume that 30 percent of Americans (18 years or older) say figure skating is their favorite event (that is, p = .3), calculate the probability of law-abiding a sample resemblance of .32 or more; that, calculate P (p > .32) B. Based on the probability you computed in part a, woul d you conclude that more than 30 percent of ! Americans (18 years or older) say that figure skating is their favorite Winter Olympic events? 8.8 THE BANK CUSTOMER postponement TIME CASE Recall that till manager has veritable a new system to sign up the measure customers spend waiting to be served by vote replication during flyer business hours. The mean waiting time during vertex business hours under the current system is roughly 9 to 10 minutes....If you want to get a full essay, parliamentary law it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper