a) Find a point estimate for the difference in average starting salaries for graduate economists and programmers. b) Let mi be the population mean starting salary for the graduate economists and let m2 be the population mean salary for the graduate programmers. Find a 96% confidence interval for mi-m2. Assume the standard deviations given are the population standard deviations. c) Based on the interval in part (b), would you be comfortable saying that the mean starting salary for graduate economists is less than that for graduate programmers? Justify your answer.

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