The image of the Japanese manager is that of a workaholic with little or no leisure time. In a survey, a random sample of 250 Japanese middle managers was asked how many hours per week they spent in leisure activities (e.g., sports, movies, television). The results of the survey were recorded. Assuming that the population standard deviation is 6 hours, estimate with 90% confidence the mean leisure time per week for all Japanese middle managers. What do these results tell you?
Answer to relevant QuestionsOne measure of physical fitness is the amount of time it takes for the pulse rate to return to normal after exercise. A random sample of 100 women age 40 to 50 exercised on stationary bicycles for 30 minutes. The amount of ...Review the results of Exercise 10.43. Describe what happens to the sample size whena. The population standard deviation decreases.b. The confidence level decreases.c. The bound on the error of estimation decreases.a. A statistics practitioner took a random sample of 50 observations from a population with a standard deviation of 25 and computed the sample mean to be 100. Estimate the population mean with 90% confidence.b. Repeat part ...a. Given the following information, determine the 90% confidence interval estimate of the population mean using the sample median.Sample median = 500, σ = 12, and n = 50b. Compare your answer in part (a) to that produced in ...H0: µ = 50H1: µ < 50σ = 15, n = 100, x̄ = 48, α = .05“What-if analyses” designed to determine what happens to the test statistic and p-value when the sample size, standard deviation, and sample mean change. These ...
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