A stock analyst wants to know if there is a difference between the mean rate of return

Question:

A stock analyst wants to know if there is a difference between the mean rate of return from energy stocks and that from financial stocks. He randomly selects 13 energy stocks and computes the rate of return for the past year. He randomly selects 13 financial stocks and computes the rate of return for the past year.

Determine whether the sampling method is independent or dependent.

Stocks
Stocks or shares are generally equity instruments that provide the largest source of raising funds in any public or private listed company's. The instruments are issued on a stock exchange from where a large number of general public who are willing...