WebAssign+ → X COTE ICTTETEER .... .... ......H......How profitable are different sectors of the stock market? One way to answer such a question is to examine profit as a percentage of stockholder equity. A random sample of 26 retail stockssuch as Toys 'R' Us, Best Buy, and Gap was studied for x1, profit as a percentage of stockholder equity. The result was x1 = 13.6. A random sample of 33 utility (gas and electric) stockssuch as Boston Edison, Wisconsin Energy, and Texas Utilities was studied for x2, profit as a percentage of stockholder equity. The result was x2 = 10.1. Assume that o1 = 4.2 and o, = 3.3.(a) Categorize the problem below according to parameter being estimated, proportion p, mean u, difference of means µ1 - µ2, or difference of proportions p1 - P2. Then solve theproblem.O µ1 - 42O pP1- P2(b) Let µ̟ represent the population mean profit as a percentage of stockholder equity for retail stocks, and let u2 represent the population mean profit as a percentage ofstockholder equity for utility stocks. Find a 90% confidence interval for u - 2. (Use 1 decimal place.)lower limitupper limit(c) Examine the confidence interval and explain what it means in the context of this problem. Does the interval consist of numbers that are all positive? all negative? of differentsigns? At the 90% level of confidence, does it appear that the profit as a percentage of stockholder equity for retail stocks is higher than that for utility stocks?Because the interval contains only positive numbers, we can say that the profit as a percentage of stockholder equity is higher for retail stocks.Because the interval contains both positive and negative numbers, we can not say that the profit as a percentage of stockholder equity is higher for retail stocks.We can not make any conclusions using this confidence interval.Because the interval contains only negative numbers, we can say that the profit as a percentage of stockholder equity is higher for utility stocks.Submit AnswerView Previous Question Question 6 of 8View Next Question

Name: WebAssign+ → X COTE ICTTETEER .... .... ......H......How profitable a
Uploaded: 2024-03-20T07:07:37.000Z
Channel: Bartleby
Description: WebAssign+ → X COTE ICTTETEER .... .... ......H......How profitable are different sectors of the stock market? One way to answer such a question is to examine profit as a percentage of stockholder equity. A random sample of 26 retail stockssuch as T

Answered: Image /qna-images/answer/f642e874-2261-463b-b3ba-d2725e30a05b.jpg

Math

Statistics

WebAssign DETATEJ How profitable are different sectors of the stock market? One way to answer such a question is to examine profit as a percentage of stockholder equity. A random sample of 26 retail stocks such as Toys 'R' Us, Best Buy, and Gap was studied for x1, profit as a percentage of stockholder equity. The result was x1 = 13.6. A random sample of 33 utility (gas and electric) stocks such as Boston Edison, Wisconsin Energy, and Texas Utilities was studied for x2, profit as a percentage of stockholder equity. The result was x2 = 10.1. Assume that a = 4.2 and az = 3.3. (a) Categorize the problem below according to parameter being estimated, proportion p, mean u, difference of means u1 - 42, or difference of proportions p1 - P2. Then solve the problem. Ο μι 42 O P1 - P2 (b) Let 41 represent the population mean profit as a percentage of stockholder equity for retail stocks, and let 4z represent the population mean profit as a percentage of stockholder equity for utility stocks. Find a 90% confidence interval for u - H2. (Use 1 decimal place.) lower limit upper limit (c) Examine the confidence interval and explain what it means in the context of this problem. Does the interval consist signs? At the 90% level of confidence, does it appear that the profit as a percentage of stockholder equity for retail stocks is higher than that for utility stocks? O Because the interval contains only positive numbers, we can say that the profit as a percentage of stockholder equity is higher for retail stocks. numbers that are all positive? all negative? of different O Because the interval contains both positive and negative numbers, we can not say that the profit as a percentage of stockholder equity is higher for retail stocks. O We can not make any conclusions using this confidence interval. O Because the interval contains only negative numbers, we can say that the profit as a percentage of stockholder equity is higher for utility stocks. Submit Answer View Previous Question Question 6 of 8 View Next Question