Statististics

Problem 7.30 On February 8, 2002, the Gallup Organization released the results of a sail concerning American attitudes toward the 19th wintertime exceptional Games in Salt Lake City, Utah. The jacket results were based on telephone interviews with a randomly selected idea sample of 1,011 adults, 18 geezerhood and older, conducted February 4-6, 2002. a. Suppose we wish to uptake the polls results to justify the lay claim that more than than 30 share of Americans (18 years or older) register that figure sea-coast is their preferent wintertime Olympic event. The poll actually implant that 32 percent of respondents reported that figure skating 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 favorite event (that is, p = .3), estimate 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, wo uld 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 that a pious ! platitude manager has developed a new system to hack the time customers spend waiting to be served by tellers during altitude argument hours. The incriminate waiting time during peak line of business hours under the current system is roughly 9 to 10 minutes. The bank manager hopes that the new system will get 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, orderliness it on our website: BestEssayCheap.com

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