In a survey conducted to determine, among other things, the cost of vacations, 64 individuals were randomly sampled. Each person was asked to compute the cost of her or his most recent vacation. Assuming that the standard deviation is $400, estimate with 95% confidence the average cost of all vacations.
Answer to relevant QuestionsIn an article about disinflation, various investments were examined. The investments included stocks, bonds, and real estate. Suppose that a random sample of 200 rates of return on real estate investments was computed and ...One 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 ...a. Repeat part (b) in Exercise 10.45 after discovering that the population standard deviation is actually 5.b. Repeat part (b) in Exercise 10.45 after discovering that the population standard deviation is actually 20.a. Given the following information, determine the 98% confidence interval estimate of the population mean:b. Repeat part (a) using a 95% confidence level.c. Repeat part (a) using a 90% confidence level.d. Review parts ...H0: µ = 1000H1: µ ≠ 1000σ = 200, n = 100, x̄ = 980, α = .01Calculate the value of the test statistic, set up the rejection region, determine the p-value, interpret the result, and draw the sampling distribution.
Post your question