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Bayus (1991) studied the mean numbers of auto dealers visited by early and late replacement buyers. Letting / 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 / 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 = 4.36 and s= .51. Using a critical value and assuming approximate normality to test the hypotheses you set up by setting a equal to .10, .05, .01, and .001. Do we estimate that / is less than 4 or greater than 4? (Round your answers to 3 decimal places.) | HO: H 4 versus Ha: J 4 . ta/2 = 0.05 ta/2 = 0.025 ta/2 = 0.005 ta/2 = 0.0005 There is evidence. M is 4