a study on students drinking habits wants to determine the true average number of alcoholic drinks all uf graduate students have in a one week period. we know from preliminary studies that the standard deviation is around 1.8. how many students should be sampled to be within 0.25 drink of population mean with 95% probability?

One of every 20 customers reports poor customer service on your company’s customer satisfaction survey. you have just created a new process that should cut the number of poor customer service complaints in half. what percentage of customers would you expect to report poor service after this process is implemented? 1.) 5% 2.) 10% 3.) 2% 4.) 2.5%