The owner of a chain of mini-markets wants to compare the sales performance of two of her stores, Store 1 and Store 2. Sales can vary considerably depending on the day of the week and the season of the year, so she decides to eliminate such effects by making sure to record each store's sales on the same 12 days, chosen at random. She records the sales (in dollars) for each store on these days, as shown in the table below. 89 10 11 12 Day Store 1 Store 2 1 2 Difference (Store 1 - Store 2) Send data to calculator V 3 216 843 794 765 838 729 4 5 87 158 6 627 707 607 923 563 417 628 258 602 477 757 825 -85 166 7 244 557 381 791 522 913 700 -173 -71 123 189 45 156 -125 Based on these data, can the owner conclude, at the 0.05 level of significance, that the mean daily sales of the two stores differ? Answer this question by performing a hypothesis test regarding (which is u with a letter "d" subscript), the population mean daily sales difference between the two stores. Assume that this population of differences (Store 1 minus Store 2) is normally distributed. Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified (If necessary consult a list of formulas ) Español
The owner of a chain of mini-markets wants to compare the sales performance of two of her stores, Store 1 and Store 2. Sales can vary considerably depending on the day of the week and the season of the year, so she decides to eliminate such effects by making sure to record each store's sales on the same 12 days, chosen at random. She records the sales (in dollars) for each store on these days, as shown in the table below. 89 10 11 12 Day Store 1 Store 2 1 2 Difference (Store 1 - Store 2) Send data to calculator V 3 216 843 794 765 838 729 4 5 87 158 6 627 707 607 923 563 417 628 258 602 477 757 825 -85 166 7 244 557 381 791 522 913 700 -173 -71 123 189 45 156 -125 Based on these data, can the owner conclude, at the 0.05 level of significance, that the mean daily sales of the two stores differ? Answer this question by performing a hypothesis test regarding (which is u with a letter "d" subscript), the population mean daily sales difference between the two stores. Assume that this population of differences (Store 1 minus Store 2) is normally distributed. Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified (If necessary consult a list of formulas ) Español
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter8: Polynomials
Section8.1: Adding And Subtracting Polynomials
Problem 58PPS
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A. Find the two critical values at the 0.05 level of significance. (Round to three or more decimal places.)
B. At the 0.05 level, can the owner conclude that the
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