Question 1 Consider the following null and alternative hypotheses. Cha-09_Q17 These hypotheses ______________ .

Question 1 Consider the following null and alternative hypotheses.Cha-09_Q17These hypotheses ______________ .indicate a one-tailed test with a rejection area in the right tailindicate a one-tailed test with a rejection area in the left tailindicate a two-tailed testare established incorrectlyare not mutually exclusive .Question 2 Consider the following null and alternative hypotheses.Cha-09_Q20These hypotheses ____________ .indicate a one-tailed test with a rejection area in the right tailindicate a one-tailed test with a rejection area in the left tailindicate a two-tailed testare established incorrectlyare not mutually exclusive .Question 3 Consider the following null and alternative hypotheses.Cha-09_Q22These hypotheses ____________ .indicate a one-tailed test with a rejection area in the right tailindicate a one-tailed test with a rejection area in the left tailindicate a two-tailed testare established incorrectlyare not mutually exclusive .Question 4 A researcher is testing a hypothesis of a single mean. The critical z value for α = .05 and an onetest is 1.645. The observed z value from sample data is 1.13. The decision made by the researcher based on this information is to _________ the null hypothesis.rejectnot rejectredefinechange the alternate hypothesis intorestate the null hypothesis .Question 5 The diameter of 3.5 inch diskettes is normally distributed. Periodically, quality control inspectors at Dallas Diskettes randomly select a sample of 16 diskettes. If the mean diameter of the diskettes is too large or too small the diskette punch is shut down for adjustment; otherwise, the punching process continues. The last sample showed a mean and standard deviation of 3.49 and 0.08 inches, respectively. Using α = 0.05, the critical "t" values are __________ .-2.120 and 2.120-2.131 and 2.131-1.753 and 1.753-1.746 and 1.746-2.567 and 2.567 .Question 6 The diameter of 3.5 inch diskettes is normally distributed. Periodically, quality control inspectors at Dallas Diskettes randomly select a sample of 16 diskettes. If the mean diameter of the diskettes is too large or too small the diskette punch is shut down for adjustment; otherwise, the punching process continues. The null hypothesis is _________ .n ≠ 16n = 16μ = 3.5μ ≠ 3.5μ ≥ 3.5 .Question 7 A company believes that it controls more than 30% of the total market share for one of its products. To prove this belief, a random sample of 144 purchasers of this product is contacted. It is found that 50 of the 144 purchased this company's brand of the product. If a researcher wants to conduct a statistical test for this problem, the alternative hypothesis would be _______ .the population proportion is less than 0.30the population proportion is greater than 0.30the population proportion is not equal to 0.30the population mean is less than 40the population mean is greater than 40 .Question 8 A company believes that it controls more than 30% of the total market share for one of its products. To prove this belief, a random sample of 144 purchasers of this product is contacted. It is found that 50 of the 144 purchased this company's brand of the product. If a researcher wants to conduct a statistical test for this problem, the observed z value would be _________ .0.05 0.103 0.35 1.24 1.67 .Question 9 Elwin Osbourne, CIO at GFS, Inc., suspects that at least 25% of e-mail messages sent by GFS employees are not business related. A random sample of 300 e-mail messages was selected to test this hypothesis at the 0.01 level of significance. Fifty-four of the messages were not business related. The null hypothesis is _______ .β = 30n = 300p < 0.25p ≠ 0.25p = 0.25 .Question 10 Elwin Osbourne, CIO at GFS, Inc., suspects that at least 25% of e-mail messages sent by GFS employees are not business related. A random sample of 300 e-mail messages was selected to test this hypothesis at the 0.01 level of significance. Fifty-four of the messages were not business related. The appropriate decision is _______ . increase the sample size gather more data reject the null hypothesis do not reject the null hypothesis maintain status quo .Question 11 Elwin Osbourne, CIO at GFS, Inc., suspects that at least 25% of e-mail messages sent by GFS employees are not business related. A random sample of 300 e-mail messages was selected to test this hypothesis at the 0.01 level of significance. Sixty of the messages were not business related. The appropriate decision is _________ .increase the sample sizegather more datamaintain status quodo not reject the null hypothesisreject the null hypothesis .Question 12 When the p-value is used for hypothesis testing, the null hypothesis is rejected ifp-value mc022-1.jpg aa < p-valuep-value mc022-2.jpg ap-value = 1 - a .Question 13 Given the following information, what is your decision as to the Null Hypothesis: Syntax error. n = 36 Sample Mean = 24.6 and Sample Standard Deviation = 12 if the test is performed at a 95% confidence. not be rejectedbe rejectedNot enough information is given to answer this question.None of these alternatives is correct. .Question 14 The National Association of Landscape Professionals has determined that on average mulch lasts 87 days befor fading or degrading. Due to an improved production process that extends the life of mulch, the Association believes that there has been an increase in the useful life of standard pine bark mulch. A sample of 36 yards of mulch showed an average life of 88.5 days before it began to fade. Assume from past information that it is known that the standard deviation of the population is 9 days.a. Give the null and the alternative hypotheses. b. Compute the test statistic. c. At 99% confidence using the critical value approach, test management's belief. d. What is the p-value associated with the sample results? What is your conclusion based on the p-value? Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). -- Font family --Andale MonoArialArial BlackBook AntiquaComic Sans MSCourier NewGeorgiaHelveticaImpactSymbolTahomaTerminalTimes New RomanTrebuchet MSVerdanaWebdingsWingdings -- Font size --1 (8pt)2 (10pt)3 (12pt)4 (14pt)5 (18pt)6 (24pt)7 (36pt) -- Format --HeadingSub Heading 1Sub Heading 2ParagraphFormatted Code -- Font family -- -- Font size -- Path: Words:0 .Question 15 In 2011 a sruvey by the American Bar Association indicated that the average yearly income of attorneys was $110,000. A sample of 81 attorneys was taken in 2012 and it reflected an average yearly income of $120,000. Assume the standard deviation of the population of attorneys in 2012 is $36,000.a. We want to test to determine if there has been a significant increase in the average yearly income of attorneys. Provide the null and the alternative hypotheses. b. Compute the test statistic. c. Determine the p-value; and at 95% confidence, test the hypotheses. Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). -- Font family --Andale MonoArialArial BlackBook AntiquaComic Sans MSCourier NewGeorgiaHelveticaImpactSymbolTahomaTerminalTimes New RomanTrebuchet MSVerdanaWebdingsWingdings -- Font size --1 (8pt)2 (10pt)3 (12pt)4 (14pt)5 (18pt)6 (24pt)7 (36pt) -- Format --HeadingSub Heading 1Sub Heading 2ParagraphFormatted Code -- Font family -- -- Font size -- Path: Words:0 .Question 16 According to data from the National Retail Association, the average age of employees in the retail sector was found to be 40 years. However, based on ancedotal evidence it appears that retailers have been hiring older individuals. In order to determine whether there has been an increase in the average age of all the retail work force, a sample of 64 employees was selected. The average age in the sample was 45 years with a standard deviation of 16 years. Let a = .05.a. State the null and the alternative hypotheses. b. Compute the test statistic. c. Using the p-value approach, test to determine whether or not the mean age of all employees is significantly more than 40 years. Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). -- Font family --Andale MonoArialArial BlackBook AntiquaComic Sans MSCourier NewGeorgiaHelveticaImpactSymbolTahomaTerminalTimes New RomanTrebuchet MSVerdanaWebdingsWingdings -- Font size --1 (8pt)2 (10pt)3 (12pt)4 (14pt)5 (18pt)6 (24pt)7 (36pt) -- Format --HeadingSub Heading 1Sub Heading 2ParagraphFormatted Code -- Font family -- -- Font size -- Path: Words:0 .Question 17 A local furniture retailer guarantees that it will deliver your purchase free of charge within 15 days of purchase. The Better Business Bureau has been contacted by several unhappy customers who have complained about slow delivery times. In an effort to evaluatetheir claims, a sample of 49 past customers is taken. The average delivery time in the sample was 16.2 days. The standard deviation of the population (s) is known to be 5.6 days.a. State the null and alternative hypotheses. b. Using the critical value approach, test to determine if their advertisement is legitimate. Let a = .05. c. Using the p-value approach, test the hypotheses at the 5% level of significance. Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). -- Font family --Andale MonoArialArial BlackBook AntiquaComic Sans MSCourier NewGeorgiaHelveticaImpactSymbolTahomaTerminalTimes New RomanTrebuchet MSVerdanaWebdingsWingdings -- Font size --1 (8pt)2 (10pt)3 (12pt)4 (14pt)5 (18pt)6 (24pt)7 (36pt) -- Format --HeadingSub Heading 1Sub Heading 2ParagraphFormatted Code -- Font family -- -- Font size -- Path: Words:0 .Question 18 A local theater manager is trying to determine if it is possible to add an additional showing of "Blockbuster Movies" in order to increase sales. He believes that the average running time of all movies is equal to 140 minutes. In order to evaluate the feasibility of adding another matinée showing he takes a sample of 4 movies. The running times for these four movies is found to be 150, 150, 180 and 170 minutes. Assume the population of the running times is normally distributed.a. Compute the sample mean and the standard deviation. b. State the null and alternative hypotheses. c. Using the critical value approach, test the hypotheses at the 10% level of significance. d. Using the p-value approach, test the hypotheses at the 10% level of significance. Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). -- Font family --Andale MonoArialArial BlackBook AntiquaComic Sans MSCourier NewGeorgiaHelveticaImpactSymbolTahomaTerminalTimes New RomanTrebuchet MSVerdanaWebdingsWingdings -- Font size --1 (8pt)2 (10pt)3 (12pt)4 (14pt)5 (18pt)6 (24pt)7 (36pt) -- Format --HeadingSub Heading 1Sub Heading 2ParagraphFormatted Code -- Font family -- -- Font size -- Path: Words:0 .Question 19 The probability of making a Type I error is denoted byab1 - a1 - b .Question 20 The average manufacturing work week in metropolitan Chattanooga was 40.1 hours last year. It is believed that the recession has led to a reduction in the average work week. To test the validity of this belief, the hypotheses areHa: m ³ 40.1Ha: m < 40.1Ha: m £ 40.1Ha: m ¹ 40.1 .Question 21 A student believes that the average grade on the final examination in statistics is at least 85. She plans on taking a sample to test her belief. The correct set of hypotheses isHa: m mc056-1.jpg 85Ha: m > 85Ha: m < 85Ha: m mc056-4.jpg 85 .Question 22 A random sample of 16 statistics examinations from a large population was taken. The average score in the sample was 78.6 with a variance of 64. We are interested in determining whether the average grade of the population is significantly more than 75. Assume the distribution of the population of grades is normal.. The p-value is between ____ and _____..005 to .01.01 to .025.025 to .05.05 to 0.1 .Question 23 A random sample of 100 people was taken. Eighty-five of the people in the sample favored Candidate A. We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 80%. At 95% confidence, it can be concluded that the proportion of the population in favor of candidate Ais significantly greater than 80%is not significantly greater than 80%is significantly greater than 85%is not significantly greater than 85% .Question 24 The school's newspaper reported that the proportion of students majoring in business is at least 30%. You plan on taking a sample to test the newspaper's claim. The correct set of hypotheses isHa: P mc064-1.jpg 0.30Ha: P > 0.30Ha: P < 0.30Ha: P mc064-4.jpg 0.30 .Question 25 A random sample of 16 statistics examinations from a large population was taken. The average score in the sample was 78.6 with a variance of 64. We are interested in determining whether the average grade of the population is significantly more than 75. Assume the distribution of the population of grades is normal.At 95% confidence, it can be concluded that the average grade of the populationis not significantly greater than 75is significantly greater than 75is not significantly greater than 78.6