An accounting firm is planning for the next tax preparation season. From last year’s returns, the firm collects a systematic random sampleof 100 filings. The 100 filings showed an average preparation time of 90 minutes with a standard deviationof 140 minutes. What is the standard errorof the mean?
b. 140 minutes
c. 1.4 minutes
d. 90 minutes
This solution gives the step by step method for sampling distribution of mean