1. Hypothesis test Walmart wants to introduce a new subscription service (called Plum) that would result in customers getting free two day delivery. Walmart introduces Walmart Plum to a random sample of 99 customers. You are hired by Walmart to analyze if the introduction of Plum and two day delivery increase sales for walmart. You find that 99 random customers that were offerred plum Two Day Delivery spent 2500 per yeaer on Walmart with a sample standard deviation of 500 in sales. Test whether the sales of Walmart plum are statistically different from zero aat an alpha of (99% confidence level. Set up your null and alternative hypothesis. Test at the 15 levelof significance. Show your test and critical statisitics. Are the sales for the two Hour plum Delivery statistically different from zero? interpret your answer
1. Hypothesis test
Walmart wants to introduce a new subscription service (called Plum) that would result in customers getting free two day delivery. Walmart introduces Walmart Plum to a random sample of 99 customers. You are hired by Walmart to analyze if the introduction of Plum and two day delivery increase sales for walmart. You find that 99 random customers that were offerred plum Two Day Delivery spent 2500 per yeaer on Walmart with a sample standard deviation of 500 in sales. Test whether the sales of Walmart plum are statistically different from zero aat an alpha of (99% confidence level. Set up your null and alternative hypothesis. Test at the 15 levelof significance. Show your test and critical statisitics. Are the sales for the two Hour plum Delivery statistically different from zero? interpret your answer
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