Question

Bones Brothers & Associates prepare individual tax returns. Over prior years, Bones Brothers has maintained careful records regarding the time to prepare a return. The mean time to prepare a return is 90 minutes and the population standard deviation of this distribution is 14 minutes. Suppose 100 returns from this year are selected and analyzed regarding the preparation time. Which of the following assumptions do you need to make about the shape of the population distribution of all possible tax preparation times to make inferences about the mean time to complete a tax form?

Group of answer choices

The population distribution is skewed to the left.

The population distribution is normal.

The shape of the population distribution does not matter.

The population distribution is skewed to the right.

Answer 1

since sample size is n>=30 from Central limit theorem shape of sampling distribution of mean will be approximately normal

correct option is:

The shape of the population distribution does not matter.