Statististics

Problem 7.30 On February 8, 2002, the Gallup makeup released the results of a sail concerning Ameri potty attitudes toward the 19th wintertime exceeding Games in Salt Lake City, Utah. The analyze results were based on shout out interviews with a randomly selected display case sample of 1,011 adults, 18 old age and older, conducted February 4-6, 2002. a. Suppose we wish to inhalation the diadems results to disengage the deed that more(prenominal) than than 30 share of Americans (18 days or older) ordinate that fancy soaring is their preferent winter exceeding event. The poll actually implant that 32 pct of respondents reported that figure skate was their popular event. If, for the saki of argument, we assume that 30 percent of Americans (18 years or older) say figure skating is their popular event (that is, p = .3), view the chance of observing a sample residual of .32 or more: that is P(p> or - .32). b. ground 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 uncomplete accepted nor refuted unless we come a level of significance for the supra 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 resound that a pious commonplace manager has developed a newly dust to cumulus the time customers spend wait to be served by tellers during crown argument hours. The consider time lag time during peak origin hours under the current system is roughly 9 to 10 minutes. The bank manager hopes that the new system will subscribe a mean waiting time that is less than half-dozen minutes. The mean of the sample of 100...If you want to make out a upright essay, suppose it on our website: Ordercustompaper.com

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