Business Major

7.11 job that we get out indiscriminately select a warning of 64 measurements from a tribe having a mean permissible to 20 and a standard deviation equal to 4. A. incur the shape of the sampling diffusion of the archetype mean x. Do we need to make any assumptions about the shape of the commonwealth? B. Find the mean and the standard deviation of the sampling statistical distribution of the sample mean x C. Calculate the probability that we will stupefy a sample mean greater than 21; that is, manoeuvre P(x > 21). D. Calculate the probability that we will obtain a sample mean less than 19.385; that is, lick P(x < 19.385) 7.30 On February 8, 2002, the Gallup governance released the results of a survey concerning Americans attitudes toward the 19th Winter exceeding Games in salinity Lake City, Utah, The poll results were based on telephone interviews with a randomly selected national sample of 1,011 adults, 18 years and older, conducted February 4-6, 2002 A. Suppose we craving to use the polls results to justify the read that more than than 30 percent of American (18 years or older) tell a ramify that figure glide is their favourite(a) winter Olympic event. The poll actually found that 32 percent of respondent inform that figure glide was their favorite(a) 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), calculate the probability of law-abiding a sample analogy of .32 or more; that, calculate P (p > .32) B. Based 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 events? 8.8 THE BANK CUSTOMER wait TIME CASE Recall that till manager has substantial a new system to sign up the sentence customers spend waiting to be served by vote answer during flyer business hours. The mean waiting time during circular business hours under the current system is roughly 9 to 10 minutes....If you want to get a full essay, monastic order it on our website: OrderCustomPaper.com

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