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2 Hypothesis Testing of a Non-Zero Difference for Dependent Data WinCo wants to start an ad campaign "Save a quarter on average on every item by shopping with us instead of with Walmart." Do they have evidence for this claim at the 1% level - the level they would need to withstand a lawsuit by Walmart? Answer the following questions using Excel's data analysis toolpack. 1) For conducting the analysis in Excel, you need to test a positive mean difference. What are the null and alternative hypotheses for a difference of $0.25? (not -0.25). 2) Calculate the test statistic. 3a) Compute the critical value(s) (a = 0.01). 3b) Compute the p-value. 4) State the conclusion of the test in terms of the issue at hand.

2 Hypothesis Testing of a Non-Zero Difference for Dependent Data WinCo wants to start an ad campaign "Save a quarter on average on every item by shopping with us instead of with Walmart." Do they have evidence for this claim at the 1% level - the level they would need to withstand a lawsuit by Walmart? Answer the following questions using Excel's data analysis toolpack. 1) For conducting the analysis in Excel, you need to test a positive mean difference. What are the null and alternative hypotheses for a difference of $0.25? (not -0.25). 2) Calculate the test statistic. 3a) Compute the critical value(s) (a = 0.01). 3b) Compute the p-value. 4) State the conclusion of the test in terms of the issue at hand.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Student 10:03 PM Thu Jul 13 < CO 6 7 8 9 10 1 Item 2 Bananas (lb) 3 4 5 Roma Tomatoes (1 Deli Tater Wedges Beef Cube Steak ( Beef Top Round L Pillsbury Devils Fo Lipton Rice and Sa Sierra Nevada Pal GM Cheerios Oat Charmin Bathroor Bumble Bee Pink! Pace Thick & Chur Nalley Chili, Regul Challenge Butter ( Kraft American Sir Yuban Coffee FAC Totino's Pizza Roll: Rosarita Refried B Barilla Spaghetti ( Sun-Maid Mini Ra 123 11 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 GroceryPrices.xlsx 31 32 33 34 35 36 37 38 39 40 41 42 43 44 A Wal Mart 0.42 0.56 0.58 0.98 0.98 1.48 0.98 2.67 1.18 1.78 3.83 4.118 3.48 4.12 0.88 0.88 0.88 1.06 12.68 12.84 1.98 2.74 5.98 7.48 1.58 1.98 2.28 2.78 0.78 0.78 2.18 2.58 2.27 2.27 5.98 7.56 2.38 2.42 0.68 0.73 0.78 1.23 1.18 1.36 2.54 2.72 1.68 1.98 1.28 1.38 3.28 4.23 Mrs. Cubbison Se 0.88 1.12 Kellogg's Raisin Br 1.98 2.5 Campbell's Soup a 1.18 1.26 Red Onions (lb) Mini Peeled Carro Jif Peanut Butter, Dole Fruit Bowl, M Progresso Chicker Precious Mozzarel B WinCo Sheet1 C D E TI F G ด U H 8+ | 68% : J +
Transcribed Image Text:Student 10:03 PM Thu Jul 13 < CO 6 7 8 9 10 1 Item 2 Bananas (lb) 3 4 5 Roma Tomatoes (1 Deli Tater Wedges Beef Cube Steak ( Beef Top Round L Pillsbury Devils Fo Lipton Rice and Sa Sierra Nevada Pal GM Cheerios Oat Charmin Bathroor Bumble Bee Pink! Pace Thick & Chur Nalley Chili, Regul Challenge Butter ( Kraft American Sir Yuban Coffee FAC Totino's Pizza Roll: Rosarita Refried B Barilla Spaghetti ( Sun-Maid Mini Ra 123 11 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 GroceryPrices.xlsx 31 32 33 34 35 36 37 38 39 40 41 42 43 44 A Wal Mart 0.42 0.56 0.58 0.98 0.98 1.48 0.98 2.67 1.18 1.78 3.83 4.118 3.48 4.12 0.88 0.88 0.88 1.06 12.68 12.84 1.98 2.74 5.98 7.48 1.58 1.98 2.28 2.78 0.78 0.78 2.18 2.58 2.27 2.27 5.98 7.56 2.38 2.42 0.68 0.73 0.78 1.23 1.18 1.36 2.54 2.72 1.68 1.98 1.28 1.38 3.28 4.23 Mrs. Cubbison Se 0.88 1.12 Kellogg's Raisin Br 1.98 2.5 Campbell's Soup a 1.18 1.26 Red Onions (lb) Mini Peeled Carro Jif Peanut Butter, Dole Fruit Bowl, M Progresso Chicker Precious Mozzarel B WinCo Sheet1 C D E TI F G ด U H 8+ | 68% : J +
10:02 PM Thu Jul 13 < n то 2) Calculate the test statistic. 2 Hypothesis Testing of a Non-Zero Difference for Dependent Data WinCo want to start an ad campaign “Save a quarter on average on every item by shopping with us instead of with Walmart." Do they have evidence for this claim at the 1% level - the level they would need to withstand a lawsuit by Walmart? 3a) Compute the critical value(s) (a = 0.01). 3b) Compute the p-value. 3 Answer the following questions using Excel's data analysis toolpack. 1) For conducting the analysis in Excel, you need to test a positive mean difference. What are the null and alternative hypotheses for a difference of $0.25? (not -0.25). HO 68% 4) State the conclusion of the test in terms of the issue at hand. +: Confidence Interval for Two Means: Dependence Construct a 95% confidence interval for the expected difference (Walmart minus WinCo) in prices and interpret the interval in terms of the issue at hand. Does the interval contain $0.25? Does this contradict the conclusion of the previous test? 4 Your Marketing Campaign Consider the differences in prices in your Excel spreadsheet, calculated from part 1 of this worksheet. Do they suggest a possible marketing campaign that could, seemingly, stand up to a lawsuit by Walmart? What would the campaign be? U 2 / >
Transcribed Image Text:10:02 PM Thu Jul 13 < n то 2) Calculate the test statistic. 2 Hypothesis Testing of a Non-Zero Difference for Dependent Data WinCo want to start an ad campaign “Save a quarter on average on every item by shopping with us instead of with Walmart." Do they have evidence for this claim at the 1% level - the level they would need to withstand a lawsuit by Walmart? 3a) Compute the critical value(s) (a = 0.01). 3b) Compute the p-value. 3 Answer the following questions using Excel's data analysis toolpack. 1) For conducting the analysis in Excel, you need to test a positive mean difference. What are the null and alternative hypotheses for a difference of $0.25? (not -0.25). HO 68% 4) State the conclusion of the test in terms of the issue at hand. +: Confidence Interval for Two Means: Dependence Construct a 95% confidence interval for the expected difference (Walmart minus WinCo) in prices and interpret the interval in terms of the issue at hand. Does the interval contain $0.25? Does this contradict the conclusion of the previous test? 4 Your Marketing Campaign Consider the differences in prices in your Excel spreadsheet, calculated from part 1 of this worksheet. Do they suggest a possible marketing campaign that could, seemingly, stand up to a lawsuit by Walmart? What would the campaign be? U 2 / >
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