Statististics

Problem 7.30 On February 8, 2002, the Gallup Organization released the results of a sail concerning American attitudes toward the 19th wintertime exceeding Games in Salt Lake City, Utah. The analyse results were based on telephone interviews with a randomly selected subject matter sample of 1,011 adults, 18 old age and older, conducted February 4-6, 2002. a. Suppose we wish to use of goods and services the polls results to justify the study that more than than 30 share of Americans (18 years or older) place that figure slide is their preferent spend Olympic event. The poll actually implant that 32 percent of respondents reported that figure skating was their popular event. If, for the involvement of argument, we assume that 30 percent of Americans (18 years or older) say figure skating is their favorite event (that is, p = .3), foreshadow the chance of observing a sample residual of .32 or more: that is P(p> or - .32). b. Based on the probability you comp uted 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 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 tha t a pious cliche manager has developed a n! ew system to bulk the time customers spend waiting to be served by tellers during apex argument hours. The suppose waiting time during peak calling hours under the current system is roughly 9 to 10 minutes. The bank manager hopes that the new system will train 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, enunciate it on our website: OrderEssay.net

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