Bayus (1991) studied the mean numbers of auto dealers visited by early and late replacement buyers. letting μ be the mean number of dealers visited by all late replacement buyers, set up the null and alternative hypotheses needed if we wish to attempt to provide evidence that μ differs from 4 dealers. a random sample of 100 late replacement buyers yields a mean and a standard deviation of the number of dealers visited of x⎯⎯ = 4.28 and s = .58. using a critical value and assuming approximate normality to test the hypotheses you set up by setting α equal to .10, .05, .01, and .001. do we estimate that μ is less than 4 or greater than 4? (round your answers to 3 decimal places.)