Question: The high price of medicines is a source of major
The high price of medicines is a source of major expense for those seniors in the United States who have to pay for these medicines themselves. A random sample of 2000 seniors who pay for their medicines showed that they spent an average of $4600 last year on medicines with a standard deviation of $800. Make a 98% confidence interval for the corresponding population mean.
Answer to relevant QuestionsJack’s Auto Insurance Company customers sometimes have to wait a long time to speak to a customer service representative when they call regarding disputed claims. A random sample of 25 such calls yielded a mean waiting ...A company randomly selected nine office employees and secretly monitored their computers for one month. The times (in hours) spent by these employees using their computers for non–job-related activities (playing games, ...What assumption(s) must hold true to use the normal distribution to make a confidence interval for the population proportion, p? A sample selected from a population gave a sample proportion equal to .31. a. Make a 95% confidence interval for p assuming n = 1200. b. Construct a 95% confidence interval for p assuming n = 500. c. Make a 95% confidence ...It is said that happy and healthy workers are efficient and productive. A company that manufactures exercising machines wanted to know the percentage of large companies that provide on-site health club facilities. A sample ...
Post your question