Statistics Homework

User Generated

Qrgrezvarq123

Mathematics

Bowie State University

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Please use power points from last assignment and please bold answers.

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Correlation Coefficient Homework http://www.mathportal.org/calculators/statistics-calculator/correlation-andregression-calculator.php (Don’t forget to highlight the radio button to find the correlation coefficient) Again, use your store data. 1. Look at the four categories below (2-5). Take a guess at which two variables will yield the highest correlation coefficient. Put an answer here. Just guess. Identify the correlation coefficient for the following (use your store data sheet): 2. Traffic and OppVol 3. Transaction and OppVol 4. UPT and Transaction 5. OppVol and UPT Name M. Scott T. Dixon L. Thompson J. Santiago V. Teagle L. McKinnon S. Leaderis I. McClean S. Totalier J. Hags M. Clarke A. Reda D. Arias C. Endsoy P. Worlda S. Miller R. Haug J. Merrell B. Wilson M. Davis E. Brown L. Wheeler T. Brown M. Mayo M. Terrell Gender m f f m m m m m f f f m m f f m f f m f f m f f f Sales 6395 6441 6539 1683 6356 6556 1301 1566 1533 1103 1095 1656 6611 6113 1353 1966 1356 1653 6655 6311 1699 6113 6144 6533 1386 UPT - Units per transaction OppVol - Missed Sales based on volume Transactions Traffic 109 96 33 105 31 86 55 50 60 69 104 95 101 88 63 30 36 53 55 81 55 36 66 86 51 UPT 616 186 616 166 113 166 111 130 113 186 186 111 186 166 130 616 186 103 91 93 93 130 103 186 100 OppVol 5.64 6.03 6.06 3.03 5.56 6.43 6.06 5.86 5.56 6.31 6.51 6.66 6.33 5.8 6.66 6.68 6.81 6.33 3.03 6.68 6.56 5.64 5.64 5.69 6.66 1316 1050 951 895 834 861 384 618 456 353 659 658 653 133 159 143 136 106 64 56 34 36 31 30 65 1. What is meant by the statement that correlation does not imply causality? (use your own words) 2. In a test of the Weight Watchers weight loss program, weights of 40 subjects are recorded before and after the program. Assume that the before/after weights result in r = 0.876. Is there sufficient evidence to support a claim of a linear correlation between the before/after weights? Does the value of r indicate that the program is effective in reducing weight? Why or why not?
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