Advertisers need to know which age groups are likely to see their ads. Purchasers of 120 copies of Cosmopolitan are shown by age group. Purchaser Age Units Sold 18 to 24 38 25 to 34 28 35 to 44 19 45 to 54 16 55 to 64 10 65+ 9 Total 120 Click here for the Excel Data File (a) Calculate the chi-square test statistic, degrees of freedom, and the p-value. Assume the expected frequencies are equal. (Perform a uniform