QUESTION 12 When the pvalue is used for hypothesis testing t

QUESTION 12 When the p-value is used for hypothesis testing, the null hypothesis is rejected if p-value mc022-1.jpg a a < p-value p-value mc022-2.jpg a p-value = 1 - a 2 points Save Answer

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 rejected be rejected Not enough information is given to answer this question. None of these alternatives is correct. 5 points Save Answer

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? Path: pWords:0 8 points Save Answer

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. Path: pWords:0 6 points Save Answer

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. Path: pWords:0 6 points Save Answer

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. Path: pWords:0 6 points Save Answer

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. Path: pWords:0 8 points Save Answer

QUESTION 19 The probability of making a Type I error is denoted by a b 1 - a 1 - b 2 points Save Answer

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 are H0: m < 40.1 Ha: m ³ 40.1 H0: m ³ 40.1 Ha: m < 40.1 H0: m > 40.1 Ha: m £ 40.1 H0: m = 40.1 Ha: m ¹ 40.1

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