You take a simple random sample of size 8 from Population1 and a simple random sample of size 12 from Population 2. The mean of the first sample is 24; the sample standard deviation is 4. The mean of the second sample is 18; the sample standard deviation is 5. Show the 90% confidence interval estimate of the difference between the means of the two populations represented here.
Answer to relevant QuestionsFor the situation described in Exercise 33 (testing the two CD ROM drives), suppose sample sizes had each been10 instead of 35. Revise your confidence interval estimate. Recently Burke Inc. Conducted research focused on the primary employee feedback tools used by companies to listen to employee concerns. The sample was composed of 50 Fortune 500 companies and 161 midsized companies. Company ...To assess the effectiveness of a new workplace safety awareness program, five employees at Potemkin Realty were randomly chosen. Before they participate in the awareness program, the five workers are given a test consisting ...You want to estimate the proportion of gas stations in the state that have stopped accepting cash. You take a simple random sample of 150 stations. Twelve stations in the sample indicate that they have stopped accepting ...Topaz Research is planning to sample area television viewers in order to estimate the proportion of all TV sets that were tuned to Channel 4 to watch the latest NBC miniseries. a. If the company intends to produce a 95% ...
Post your question