Wal-Mart wants to introduce a new subscription service (called Plum) that would result in customers getting free two-day delivery. Wal-Mart introduces Wal-Mart Plum to a random sample of 99 customers. You are hired by Wal-Mart to analyze if the introduction of Plum and two-day delivery increases sales for Wal-Mart. You find that the 99 random customers that were offered Plum Two Day Delivery spent $2,500 per year on Wal-Mart with a sample standard deviation of $500 in sales. (A) Test whether the sales of Wal-Mart Plum are statistically different from zero at an alpha of 1% (99% confidence level). Set up your null and alternative hypotheses. Test at the 1% level of significance. Show your test and critical statistics. Are the sales for Two-Hour Plum Delivery statistically different from 0? Interpret your answer. Show your work (B) Suppose the typical Wal-Mart consumer spends $2000 a year. Test whether the introduction of Wal-Mart Plum Delivery increased sales. Set up your null and alternative hypotheses. Test at an alpha of 1% (99% confidence level). Show your test and critical statistics. Did Plum significantly increase sales? Interpret your answer. Show your work I am stuck and need help the answers I seem to get do not feel right to me I would like to see where I might be getting mixed up. at
Wal-Mart wants to introduce a new subscription service (called Plum) that would result in customers getting free two-day delivery. Wal-Mart introduces Wal-Mart Plum to a random sample of 99 customers. You are hired by Wal-Mart to analyze if the introduction of Plum and
two-day delivery increases sales for Wal-Mart. You find that the 99 random customers that were offered Plum Two Day Delivery spent $2,500 per year on Wal-Mart with a sample standard deviation of $500 in sales.
(A) Test whether the sales of Wal-Mart Plum are statistically different from zero at an alpha of 1% (99% confidence level). Set up your null and alternative hypotheses. Test at the 1% level of significance. Show your test and critical statistics. Are the sales for Two-Hour Plum Delivery statistically different from 0? Interpret your answer. Show your work
(B) Suppose the typical Wal-Mart consumer spends $2000 a year. Test whether the introduction
of Wal-Mart Plum Delivery increased sales. Set up your null and alternative hypotheses. Test at an alpha of 1% (99% confidence level). Show your test and critical statistics. Did Plum significantly increase sales? Interpret your answer. Show your work
I am stuck and need help the answers I seem to get do not feel right to me I would like to see where I might be getting mixed up. at
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