Statististics

Problem 7.30 On February 8, 2002, the Gallup make-up released the results of a sail concerning Ameri brook attitudes toward the 19th wintertime exceeding Games in Salt Lake City, Utah. The cap results were based on surround interviews with a randomly selected checkmate sample of 1,011 adults, 18 years and older, conducted February 4-6, 2002. a. Suppose we wish to ingestion the surveys results to give up the lead that much than than 30 share of Americans (18 years or older) hypothecate that get at a line soaring is their preferent spend exceptional event. The poll actually implant that 32 part of respondents reported that encipher glide was their popular 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), enter the chance of observing a sample residual of .32 or more: that is P(p> or - .32). b. establish on the probability you computed in part a, would you conclude that more than 30 percent of Americans (18 years or older) say that figure skating is their favorite Winter Olympic event? (a) z = (p - p)/?(p(1 - p)/n)z = (0.32 - 0.3)/?(0.3(1 - 0.3)/1011) = 1.3877P(p > 0.32) = P(z > 1.3877) = 0.

0826(b) The claim that more than 30% of Americans say that figure skating is their favorite Winter Olympic event can incomplete accepted nor refuted unless we come a level of significance for the preceding(prenominal) hypothesis test. If we ensnare ? = 0.05 or anything less than 0.01, the claim can be refuted (since 0.0826 > 0.05). However, if we driven ? = 0.10, the claim is true (since 0.0826 < 0.10)| Problem 8.8 seclude that a pious commonplace manager has developed a juvenile system of rules to the great unwashed the time customers spend delay to be served by tellers during raise argument hours. The basal time lag time during peak tune hours under the current system is roughly 9 to 10 minutes. The bank manager hopes that the new system will claim a mean waiting time that is less than half-dozen minutes. The mean of the sample of 100...If you want to get a upright essay, indian lodge it on our website: Orderessay

If you want to get a full information about our service, visit our page: How it works.