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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 10 days chosen at random She records the sales in dollars for each store on these days as shown in the table below Day Store 1 Store 2 Difference Store 1 Store 2 Send data to calculator 1 2 480 631 3 706 4 5 6 899 907 694 158 289 278 61 7 89 10 326 575 322 342 428 838 585 592 327 663 673 454 a State the null hypothesis Ho and the alternative hypothesis H Ho D H 0 b Determine the type of test statistic to use Type of test statistic Choose one 322 102 1 88 51 111 724 Based on these data can the owner conclude at the 0 10 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 565 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 c Find the value of the test statistic Round to three or more decimal places 0 d Find the two critical values at the 0 10 level of significance Round to three or more decimal places 0 and 0 e At the 0 10 level can the owner conclude that the mean daily sales of the two stores differ OYes O No X 4 X O S O O P Q OSO 020 S 00 O

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