The Costa Gravas Company wants to evaluate two different in store promotions for its latest entry into the consumer electronics market. You have matched retail stores that carry the product according to size and location. You now randomly choose five matched pairs of stores, then randomly assign one store in each pair to Promotion1 and the other to Promotion 2. At the end of the month, the change in product sales (versus the previous month) for each store is reported. Using the data in the table below and assuming that the necessary populations conditions are satisfied build a 95% confidence interval estimate of the difference in average sales changes for the populations represented.
Answer to relevant QuestionsIn a test of running shoes, French sporting goods manufacturer Mostelle randomly chose six amateur runners to test two of its new shoe designs. The order in which each runner tested the shoes was randomly determined. The ...Refer to Exercise 50. a. Show the bar chart for the sampling distribution and comment on its shape. b. Show that the mean of the sampling distribution is exactly equal to the population proportion, . c. Show that the ...In a recent random sample of 1350 registered Democrats across the country, 525 of those surveyed expressed opposition to a government proposal to relax trade restrictions with Cuba. a. Use the sample information to build ...The marketing director at Homecare Products wants to measure the response of customers to the company’s new cinnamon flavored toothpaste. Suppose she plans to take a simple random sample of customers and wants a margin of ...You are planning to construct a 90% confidence interval estimate of a population proportion. You want your estimate to have a margin of error of .03. What is the minimum required sample size if the population proportion is ...
Post your question