\f\fa. All hand calculations should be entered using Microsoft Equation editor or Math type (one of these is always located in Word; go to insert -> object -> Microsoft Equation editor or Math type object.) or inserted into the document as a jpeg or gif file. b. All Excel Work should be entered/copied and pasted into Word or PDF document. 1. Suppose that the Smith CPA firm claims that its clients receive larger tax refunds, on average, than clients of its competitor, Jones and Company CPA, located on the other side of Chicago. To test the claim, 15 clients from the Smith firm are randomly selected and found to have a mean tax refund of $942 with a standard deviation of $103. At Jones and Company, a random sample of 18 clients are surveyed and found to have a mean refund of $898 with a standard deviation of $95. Test the claim made by the Smith firm at the 0.05 level of significance. Assume that both population distributions are approximately normal. Assume that the variances for the two populations are not equal. 2. See Attached 3. See Attached