According to a study, it takes an average of 330 minutes for taxpayers to prepare, copy, and electronically file a income tax return The distnbution of times follows a normal distribution with a standard deviation of 80 A rand sample of 40 taxpayers is picked What is the standard error of the mean? 0 5.25 16 12.65 Question 2 (1 point) 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 a normal distribution with a standard deviation of 80 A random sample of 40 taxpayers is picked Calculate the z score for 320 minutes