Please answer these questions and put them in a readable format (ex. 1a, 1b, 2a, 2b, etc...). No explanation needed

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Exercise 10.09 Algo (lnferences About the Difference Between Two Population Means: Sigmas Unknown) Question 1 O\" ' Hint(s) Check My Work Consider the following results for independent random samples taken from two populations. Sample 1 Sample 2 m = 10 m = 40 El = 22.8 52 = 20.3 .91 = 2.1 .92 = 4.6 a. What is the point estimate of the difference between the two population means (to 1 decimal)? b. What is the degrees of freedom for the 75 distribution (round the answer to the previous whole number)? c. At 95% confidence, what is the margin of error (to 1 decimal)? d. What is the 95% confidence interval for the difference between the two population means (to 1 decimal and enter negative value as negative number)? ( i ) Exercise 10.19 Algo (Inferences About the Difference Between Two Population Means: Matched Samples) Consider the following hypothesis test. The following data are from matched samples taken from two populations. Hozpd0 1 22 29 19 20 25 a. Compute the difference value for each element. If your answer is zero, enter "0". Element Difference 1 2 3 4 5 b. Compute g. c. Compute the standard deviation 8d. 21 27 19 20 23 Question 1 of 8 D Hint(s) Check My Work d. Conduct a hypothesis test using a = 0.05. What is the p-value? The p-value is - Select your answer - v What is your conclusion? I - Select your answer - v Hint(s) Check My Work d. Conduct a hypothesis test using a = 0.05. What is the pvalue? The pvalue is \\l - Select your answer - 3 What is your 1 - Select your less than 0.005 between 0.005 and 0.01 between 0.01 and 0.025 between 0.025 and 0.05 between 0.05 and 0.10 between 0.10 and 0.20 greater than 0.20 Hint(s) Check My Work d. Conduct a hypothesis test using a = 0.05. What is the p-value? The p-value is - Select your answer - V What is your conclusion? V - Select your answer - Reject HO, Mean population 1 is greater than mean population 2 Do not reject HO, Mean population 1 is less than or equal to mean population 2 Hint(s) Check My WorkThe following data are from matched samples taken from two populations. 1 2 1 10 s 2 6 14 3 14 14 4 6 13 5 13 9 s 12 12 7 7 11 a. Compute the difference value for each element (difference between element of population 1 and population 2 and enter negative values as negative numbers, if any). If your answer is zero, enter "0". Element Difference Value 1 510501me b. Compute (f (to 3 decimals). Enter negative value as negative number, if any. d: c. Compute the standard deviation 8d (to 3 decimals). 8d: d. What is the point estimate of the difference between the two population means (to 3 decimals)? Enter negative value as negative number, if any. e. Provide a 95% confidence interval for the difference between the two population means (to 3 decimals and enter negative values as negative numbers, if any).A market research rm used a sample of individuals to rate the purchase potential of a particular product before and after the individuals saw a new television commercial about the product. The purchase potential ratings were based on a 0 to 10 scale, with higher values indicating a higher purchase potential. The null hypothesis stated that the mean rating "after" would be less than or equal to the mean rating "before." Rejection of this hypothesis would show that the commercial improved the mean purchase potential rating. Use a = 0.05 and the following data to test the hypothesis and comment on the value of the commercial. After Before After Before 1 7 6 5 3 4 2 6 4 6 9 7 3 8 8 7 6 6 4 4 3 8 6 7 What are the hypotheses? Ho: a. Ha: Md '5 - Select your answer - V Compute I? (to 3 decimals). Compute ad (to 1 decimal). What is the p-value? The pvalue is - Select your answer - v What is your decision? - Select your answer - v The price per share of stock for a sample of 25 companies was recorded at the beginning of the first financial quarter and then again at the end of the first financial quarter. How stocks perform during the first quarter is an indicator of what is ahead for the stock market and the economy. Use the sample data in the file StockQuarter to answer the following. Click on the datafile logo to reference the data. DATA file Beginning of 1st End of 1st Company Quarter Quarter Bank of New York Mellon 53.82 54.19 Kraft Foods 77.02 55.70 E.I. du Pont de Nemours and Company 109.00 102.57 Consolidated Edison 83.58 79.95 Johnson & Johnson 139.23 126.01 Union Pacific 135.78 132.73 Comcast 41.07 32.06 Applied Materials 53.04 50.91 Pfizer 36.44 35.40 General Electric 17.98 14.05 AT&T 38.54 32.54 Cisco Systems 38.86 44.83 Home Depot 188.03 184.63 JP Morgan Chase 107.95 108.78 Procter & Gamble 90.65 71.96 Verizon 53.53 48.82 Devon Energy 42.23 36.20 Lilly 84.68 79.07 Microsoft 85.95 95.00 Coca Cola 45.59 42.59 Qualcomm 65.20 50.82 Exxon Mobil Corporation 85.03 76.95 PG&E Corporation 44.49 46.27 Oracle Corporation 46.63 45.95 Chevron 127.58 129.86A B C Beginning of 1st End of 1st Company Quarter Quarter 2 Bank of New York Mellon 53.82 54.19 Kraft Foods 77.02 55.70 4 E.I. du Pont de Nemours and Company 109.00 102.57 5 Consolidated Edison 83.58 79.95 6 Johnson & Johnson 139.23 126.01 Union Pacific 135.78 132.73 8 Comcast 41.07 32.06 9 Applied Materials 53.04 50.91 10 Pfizer 36.44 35.40 11 General Electric 17.98 14.05 12 AT&T 38.54 32.54 13 Cisco Systems 38.86 44.83 14 Home Depot 188.03 184.63 15 JP Morgan Chase 107.95 108.78 16 Procter & Gamble 90.65 71.96 17 Verizon 53.53 48.82 18 Devon Energy 42.23 36.20 19 Lilly 84.68 79.07 20 Microsoft 85.95 95.00 21 Coca Cola 45.59 42.59 22 Qualcomm 65.20 50.82 23 Exxon Mobil Corporation 85.03 76.95 24 PG&E Corporation 44.49 46.27 25 Oracle Corporation 46.63 45.95 26 Chevron 127.58 129.86a. Let di denote the percentage change in price per share for company i where (1 end of 1\" quarter price per share 7 beginning of 1\" quarter price per share 12 _ beginning 01" 1\" quarter price per share Use the sample mean of these values to estimate the percentage change in the stock price over the first quarter. Do not round intermediate calculations. Enter negative value as negative number, if any. (to 3 decimals) b. What is the 90% confidence interval estimate of the population mean percentage change in the price per share of stock during the first quarter? Do not round intermediate calculations. Enter negative values as negative numbers, if any. Confidence interval ( , ) (to 3 decimals) Interpret this result. The stock market experiences - Select your answer - v in prices. Bank of America's Consumer Spending Survey collected data on annual credit card charges in seven different categories of expenditures: transportation, groceries, dining out, household expenses, home furnishings, apparel, and entertainment. Using data from a sample of 42 credit card accounts, assume that each account was used to identify the annual credit card charges for groceries (population 1) and the annual credit card charges for dining out (population 2). swered the difference data, the sample mean difference was 3 = $850 , and the sample standard deviation was 5,1 = $1,123. a. Formulate the null and alternative hypotheses to test for no difference between the population mean credit card charges for groceries and the population mean credit card charges for dining out. H0 : [1.4 - Select your answer - .Ha : Md - Select your answer - II b. Use a = 0.05 level of significance. Can you conclude that the population means differ? - Select your answer - v What is the p-value? (to 6 decimals) c. Which category, groceries or dining out, has a higher population mean annual credit card charge? - Select your answer - V What is the point estimate of the difference between the population means? Round to the nearest whole number. What is the 95% confidence interval estimate of the difference between the population means? Round to the nearest whole number. ( . ) The College Board SAT college entrance exam consists of two sections: math and evidencebased reading and writing (EBRW). Sample data showing the math and EBRW scores for a sample of 12 students who took the SAT follow. Click on the datafile logo to reference the data. DATAF Student Math EBRW Student Math EBRW 1 540 474 7 430 430 2 432 380 8 499 459 3 528 463 9 610 61 5 4 574 612 10 572 541 5 448 420 11 390 335 6 502 526 12 593 613 3. Use a 0.05 level of significance and test for a difference between the population mean for the math scores and the population mean for the EBRW scores. What is the test statistic? Enter negative values as negative numbers. Round your answer to two decimal places. t : What is the pvalue? Round your answer to four decimal places. What is your conclusion? I. Reject Ho. We cannot conclude that there is a significant difference between the population mean scores for the SAT math test and the SAT writing test. 11. Do not reject Ho. We cannot conclude that there is a significant difference between the population mean scores for the SAT math test and the SAT writing test. 111. Reject Ho. We can conclude that there is a significant difference between the population mean scores for the SAT math test and the SAT writing test. IV. Do not reject H0. We can conclude that there is a significant difference between the population mean scores for the SAT math test and the SAT writing test. - Select your answer - V b. What is the point estimate of the difference between the mean scores for the two tests? What are the estimates of the population mean scores for the two tests? Math test EBRW test Which test reports the higher mean score? - Select your answer - V \fScores in the first and fourth (final) rounds for a sample of 20 golfers who competed in PGA tournaments are shown in the following table. Suppose you would like to determine whether the mean score for the first round of PGA Tour event is significantly different than the mean score for the fourth and final round. Does the pressure of playing in the final round cause scores to go up? Or does the increased player concentration cause scores to come down? Enter negative values as negative numbers. First Final First Final Player Round Round Player Round Round Michael Letzig 71 75 Aron Price 67 77 Scott Verplank 69 68 Charles Howell 76 77 D.A. Points 69 99 Jason Dufner 70 75 Jerry Kelly 73 76 Mike Weir 70 72 Soren Hansen 69 72 Carl Pettersson 74 71 D.J. Trahan 69 75 Bo Van Pelt 75 72 Bubba Watson 72 72 Ernie Els 71 71 Reteif Goosen 69 67 Cameron Beckman 67 65 Jeff Klauk 65 77 Nick Watney 74 66 Kenny Perry 66 71 Tommy Armour III 72 66 a. Use a = 0.10 to test for a statistically significantly difference between the population means for first- and fourth-round scores. What is the p-value? t-value (to 3 decimals) Degrees of freedom p-value is - Select your answer - What is your conclusion? There - Select your answer - | significant difference between the mean scores for the first and final rounds.b. What is the point estimate of the difference between the two population means? (to 2 decimals) For which round is the population mean score lower? - Select your answer - V c. What is the margin of error for a 90% confidence interval estimate for the difference between the population means? (to 3 decimals) Could this confidence interval have been used to test the hypothesis in part (a)? - Select your answer - V Explain. Use the point of the difference between the two population means and add and subtract this MOE. If zero in the interval the difference is not statistically significant. If zero in the interval the difference is statistically significant. A personal tness produces both a deluxe and a standard model of a smoothie blender for home use. Selling prices obtained from a sample of retail outlets follow. Excel File: datalO27.xlsx Deluxe Standard Deluxe Standard 1 39 27 5 4O 30 2 39 28 6 39 34 3 45 35 7 35 29 4 38 30 Round your answers to 2 decimal places. a. The manufacturer's suggested retail prices for the two models show a $10 price differential. Use a 0.05 level of significance and test that the mean difference between the prices of the two models is $10 . l - Select your answer - vl b. What is the 95% confidence interval for the difference between the mean prices of the two models? to