You are working for a supermarket. The manager has asked you to estimate the mean time taken by a cashier to serve customers at this supermarket. Briefly explain how you will conduct this study. Collect data on the time taken by any supermarket cashier to serve 40 customers. Then estimate the population mean. Choose your own confidence level.
Answer to relevant QuestionsYou are working for a bank. The bank manager wants to know the mean waiting time for all customers who visit this bank. She has asked you to estimate this mean by taking a sample. Briefly explain how you will conduct this ...a. A sample of 1100 observations taken from a population produced a sample proportion of .32. Make a 90% confidence interval for p. b. Another sample of 1100 observations taken from the same population produced a sample ...Briefly explain how the width of a confidence interval decreases with a decrease in the confidence level. Give an example. In a random sample of 50 homeowners selected from a large suburban area, 19 said that they had serious problems with excessive noise from their neighbors. a. Make a 99% confidence interval for the percentage of all ...You want to estimate the proportion of students at your college who hold off-campus (part-time or fulltime) jobs. Briefly explain how you will make such an estimate. Collect data from 40 students at your college on whether ...
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