Statististics

Problem 7.30 On February 8, 2002, the Gallup Organization released the results of a sail concerning American attitudes toward the 19th wintertime surpassing Games in Salt Lake City, Utah. The summit results were based on telephone interviews with a randomly selected take sample of 1,011 adults, 18 eld and older, conducted February 4-6, 2002. a. Suppose we wish to aspiration the polls results to justify the assume that more than than 30 share of Americans (18 years or older) assert that figure soaring is their preferent overwinter Olympic event. The poll actually implant that 32 percent of respondents reported that figure skating was their popular event. If, for the stake of argument, we assume that 30 percent of Americans (18 years or older) say figure skating is their favorite event (that is, p = .3), answer for the chance of observing a sample residual of .32 or more: that is P(p> or - .32). b. Based on the probability you computed in part a, would you c onclude 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 neither accepted nor refuted unless we come a level of significance for the above 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 Recall that a pious cliche manager has developed a new system to tailor the time customers spend waiting to be served by tellers during airlift argument hours. The sloshed waiting time during peak concern hours under the current system is roughly 9 to 10 minutes. The bank manager hopes that the new system will accept a mea n waiting time that is less than half-dozen! minutes. The mean of the sample of 100...If you want to get a upright essay, locate it on our website: OrderEssay.net

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