A random sample of 78 employees at a large computer software firm was polled to determine method of travel to work. A random sample of 80 employees of an accounting firm in the same office complex was also polled. The results are shown in Exhibit 12.40 below. Is there evidence that the proportions of workers who travel to work via the different methods are different between the two firms? Use α = 5%.
Answer to relevant QuestionsWhy don’t we pool sample data when we are constructing a confidence interval estimate of p1 – p2? 24. Based on the sample evidence in Exhibits 12.42 and 12.43 in Exercises 21 and 23, is there evidence of a difference in the proportions of peanuts in the mixed-nuts packages of the two companies? Use α = 5%. A large mail order company is trying to decide between two delivery services: Canada Post and a private courier. The mail order company selects a random sample of 100 deliveries for the private courier, and another sample of ...The coefficient of determination for the data collected on monthly income and monthly spending on restaurant meals in Vancouver is 0.18.What does this mean? The Top 25 global research organizations include companies such as The Nielsen Company, the Ipsos Group, and Harris Interactive. Data about global research revenues (in US$ millions) and the number of full-time employees ...
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