I need a: the function used in calculatorb: equation including values from problem c: the interval found using proper notation d: findings:

10 = 1.645 x 9:23 = 0. 0822 C 6. 0608 , 6. 83 10. To determine how profitable different sectors of the stock market are, profit as a percentage of stockholder equity was examined. A random sample of 32 retail stocks such as Toys 'R Us, Best Buy, and Gap was studied for profit as a percentage of stockholder equity and this sample had a mean of 13.7. A random sample of 34 utility (gas and electric) stocks such as Boston Edison, Wisconsin Energy, and Texas Utilities was studied for profit as a percentage of stockholder equity and their sample mean was 10.1. It is known from industry reports that the standard deviation for all retail stocks is 4.1 and the standard deviation for all utility stocks is 2.7. Find a 95% confidence interval for the difference in the population mean profit as a percentage of stockholder equity for retail stocks compared to utility stocks