A.) Use the data given to calculate annual returns for Goodman, Landry, and the Market Index, and then calculate average returns over the five-year period. (Hint: Remember, returns are calculated by subtracting the beginning price from the ending price to get the capital gain or loss, adding the dividend to the capital gain or loss, and dividing the result by the beginning price. Assume that dividends are already included in the index. Also, you cannot calculate the rate of return for 2014 because you do not have 2013 data.)

Data as given in the problem are shown below:
	Goodman Industries		Landry Incorporated		Market Index
Year	Stock Price	Dividend	Stock Price	Dividend	Includes Divs.
2020	$25.00	$1.73	$73.00	$4.50	17,495.97
2019	$22.00	$1.59	$78.00	$4.35	13,178.55
2018	$24.00	$1.50	$73.00	$4.13	13,019.97
2017	$16.00	$1.43	$86.00	$3.75	9,651.05
2016	$17.00	$1.35	$90.00	$3.38	8,403.42
2015	$11.00	$1.28	$84.00	$3.00	7,058.96

We now calculate the rates of return for the two companies and the index:

	Goodman	Landry	Index
2020
2019
2018
2017
2016
Average

B.) Calculate the standard deviation of the returns for Goodman, Landry, and the Market Index. (Hint: Use the sample standard deviation formula given in the chapter, which corresponds to the STDEV function in Excel.)

Use the function wizard to calculate the standard deviations.
		Goodman	Landry	Index
Standard deviation of returns