An accounting firm is planning for the next tax preparation season. From last year's returns, the firm collects a systematic random sample of 100 filings. The 100 filings showed an average preparation time of 90 minutes with a standard deviation of 140 minutes. What is the standard error of the mean?
How many of the problems would you expect to be resolved today?
What is the standard deviation?
What is the probability 7 of the problems can be resolved today?
What is the probability 7 or 8 of the problems can be resolved today?
What is the probability more than 10 of the problems can be resolved today?