Use the data and the claim given in Exercise 1 to identify the null and alternative hypotheses

Question:

Use the data and the claim given in Exercise 1 to identify the null and alternative hypotheses and the test statistic. What is the sampling distribution of the test statistic?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...