According to a National Public Transportation survey, the average commuting time for people who commute to a city with a population of 1 to 3 million is 19.0 minutes. Suppose a researcher lives in a city with a population of 2.4 million and wants to test this claim in her city. Assume that commuter times are normally distributed in the population. She takes a random sample of commuters and gathers data. The data are analyzed using both Minitab and Excel, and the output is shown here. What are the results of the study? What are thehypotheses?
Answer to relevant QuestionsSuppose you are testing H0: p = .45 versus Ha: p > .45.A random sample of 310 people produces a value of p̂ = .465. Use α = .05 to test this hypothesis.A survey was undertaken by Bruskin/Goldring Research for Quicken to determine how people plan to meet their financial goals in the next year. Respondents were allowed to select more than one way to meet their goals. ...A savings and loan averages about $100,000 in deposits per week. However, because of the way pay periods fall, seasonality, and erratic fluctuations in the local economy, deposits are subject to a wide variability. In the ...Use the information given and the eight-step approach to test the hypotheses. Let α = .01.H0:µ = 36Ha: µ ≠ 36 n = 63x̄ = 38.4σ =5.93A computer manufacturer estimates that its line of mini computers has, on average, 8.4 days of downtime per year. To test this claim, a researcher contacts seven companies that own one of these computers and is allowed to ...
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