Everyone knows that exercise is important. Recently, employees of one large international corporation were surveyed and asked, How many minutes do you spend daily on some form of rigorous exercise? From a random sample of 25 employees, the \mean time spent on vigorous daily exercise was 28.5 minutes. The standard deviation was found to be 6.8 minutes. Find a 90% interval estimate of the mean daily time spent on rigorous exercise by all employees.
Answer to relevant QuestionsThe following data represent the number of passengers per flight for a random sample of 50 flights from Jacksonville, Florida, to Baltimore, Maryland, on one particular airline: Estimate the average number of passengers per ...A sample of 33 accounting students recorded the number of hours that they spent studying for a final exam. The data are stored in the data file Study. a. Give an example of an unbiased, consistent, and efficient estimator of ...Consider the data in Exercise 7.90. It was reported in the local paper that less than one-third (from 23.7% to 32.3%) of the population prefers the online renewal process. What is the confidence level of this interval ...A dependent random sample from two normally distributed populations gives the following results: n = 15 d-bar = 25.4 sd = 2.8 a. Find the 95% confidence interval for the difference between the means of the two ...Calculate the margin of error for each of the following: a. nx = 280 p`x = 0.75 ny = 320 p`y = 0.68 b. nx = 210 p`x = 0.51 ny = 200 p`y = 0.48
Post your question