- G Enabled Ch 7 Assignment 43 S Saved Help Save Exit According To A Study It Takes An Average Of 330 Minutes For Ta 1 (37.56 KiB) Viewed 43 times
g Enabled: CH 7 Assignment -43 -S Saved Help Save & Exit According to a study, it takes an average of 330 minutes for taxpayers to prepare, copy, and electronically file an income tax return. The distribution of times follows the normal distribution and the standard deviation is 80 minutes. A random sample of 40 taxpayers is picked. Use Appendix B.1 for the z-values. a. What is the standard error of the mean in this example? (Round the final answer to 3 decimal places.) Error of the mean b. What is the likelihood the sample mean is greater than 320 minutes? (Round the final answer to 4 decimal places.) Sample mean c. What is the likelihood the sample mean is between 320 and 350 minutes? (Round the final answer to 4 decimal places.) Sample mean d. What is the likelihood the sample mean is greater than 350 minutes? (Round the final answer to 4 decimal places.) Sample mean e. Is any assumption or assumptions do you need to make about the shape of the population? (Click to select) Check my