CW #4 012424 Indep Samples vs Dependent

Group Finance Marketing Difference 1 95171 89329 5842 2 88009 92705 -4696 3 98089 99205 -1116 4 106322 99003 7319 5 74566 74825 -259 6 87089 77038 10051 Ho: mu1-mu2<=0 p-value = 0.203414 7 88664 78272 10392 Ha: mu1-mu2>0 8 71200 59462 11738 Fail to reject the null. There is not enough evidence that the mean 9 69367 51555 17812 10 82618 81591 1027 11 69131 68110 1021 12 58187 54970 3217 13 64718 68675 -3957 14 67716 54110 13606 Ho: mu_d <= 0 15 49296 46467 2829 Ha:mu_d > 0 16 56625 53559 3066 17 63728 46793 16935 18 55425 39984 15441 19 37898 30137 7761 20 56244 61965 -5721 21 51071 47438 3633 22 31235 29662 1573 23 32477 33710 -1233 3.809688 24 35274 31989 3285 0.000426 25 45835 38788 7047 mean 65438.2 60373.68 5064.52 sd 21094.59 21666.6053 6646.895 Do Finance majors make more than Marketing majors once they g let's randomly select 25 recent graduates from Finance and 25 fro record their starting salaries. Perform an appropriate hypothesis t significance level. Interpret the results. As the analyst, you think this may be an error. Something doesn't decide to group the recent graduates by final GPA, randomly selec major for each GPA group and then record their salary. Perform th hypothesis test and see how results compare.

n salary of finance is more than the mean salary of marketing graduate? To find out om Marketing and test at the 0.05 seem right. You ct one from each he appropriate This chart isn't available in your version of Excel. Editing this shape or saving this workbook into a different file format will permanently break the chart.

Textbook Bookstore Online Retailer 1 70 60 10 2 38 36 2 3 88 89 -1 4 165 149 16 5 80 136 -56 6 103 95 8 7 42 50 -8 8 98 111 -13 Is a paired design appropriate? Explain. 9 89 65 24 10 97 86 11 What assumption must be made in orde 11 140 130 10 12 40 30 10 Do the date appear to satisfy the assump 13 175 150 25 14 85 75 10 15 100 85 15 16 68 62 6 17 67 69 -2 18 140 142 -2 19 49 40 9 20 149 127 22 21 126 130 -4 Ho: mu_d <= 0 22 92 93 -1 Ha: mu_d > 0 23 144 129 15 24 98 84 14 p-value 0.09861 25 40 52 -12 4.32 16.28578 Can students save money on textbooks b buying at the local bookstore? To investi University randomly sampled 25 textboo local bookstore. The students then found for the same textbooks via online retaile Based on the data, is it less expensive fo textbooks from the online retailers than alpha = 0.01 Calculate a 99% confidence interval for t Interpret.