The Owner Of A Chain Of Mini Markets Wants To Compare The Sales Performance Of Two Of Her Stores Store 1 And Store 2 S 1 (39.56 KiB) Viewed 29 times
The Owner Of A Chain Of Mini Markets Wants To Compare The Sales Performance Of Two Of Her Stores Store 1 And Store 2 S 2 (34.22 KiB) Viewed 29 times
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 enth 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. Day 1 2 3 24 5 6 2 $ 9 10 11 12 Store 1 855 381 421 522 905 294 926 434 980 3.42 390 607 Store 2 572 221 260 882 202 723 567 203 382 335 158 283 160 161 92 23 92 303 -133 77 -140 35 Difference (Store 1 - Store 2) Send date to calculator Based on these data, can the owner conclude, at the 0.05 level of significance that the mean sily sales of the two stores offer? Answer this question by performing a hypothesis test regarding (which ist with a letter to subscript), the population mean doly 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 stor forms.) (*) state the null hypothesis H, and the siternative hypothesis P
test regar performing a hypothes 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 rc specified. (If necessary, consult a list of formulas.) (a) state the null hypothesis H, and the alternative hypothesis H. H o a р H:0 * s <o O ar 믐 DO OSC 020 ロロ OO > (b) Determine the type of test statistic to use. Type of test statistie: (Choose one) Y (C) Find the value of the test statistic (Round to three or more decimal places.) D (d) Find the two critical values at the 0.05 level of significance. (Round to three or more decimal places.) O and I (6) At the 0.05 level, can the owner conclude that the mean daily sales of the two stores differ? Yes No x х 5 ?
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