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A carpet company advertises that it will deliver your carpet within 15 days of purchase. A...
A carpet company advertises that it will deliver your carpet within 15 days of purchase. A...
A carpet company advertises that it will deliver your carpet within 15 days of purchase. 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 (0) is known to be 5.6 days. a. State the null and alternative hypotheses for a test to determine if their advertisement is legitimate. b. Using the critical value approach, test the hypotheses. Let a = .05. C. Using the p-value...
Question 3 A carpet company advertises that it will deliver your carpet within 15 days of...
Question 3 A carpet company advertises that it will deliver your carpet within 15 days of purchase. A sample of 49 past customers is taken. The average delivery time in the sample was 16.2 days. Assume the population standard deviation is known to be 5.6 days. a. State the null and alternative hypotheses. b. Using a critical value, test the null hypothesis at the 5% level of significance. c. Using a p-value, test the hypothesis at the 5% level of...
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home / study / math / statistics and probability / statistics and probability questions and answers / a carpet company advertises that it will deliver your carpet within 15 days of purchase. a ... Question: A carpet company advertises that it will deliver your carpet within 15 days of purchase. A sample... (3 bookmarks) A carpet company advertises that it will deliver your carpet within 15 days of purchase. A sample of 49 past customers is taken. The average delivery...
A Sports good company advertises that it will deliver your product within 15 days of purchase. A sample of 49 past custo...
A Sports good company advertises that it will deliver your product within 15 days of purchase. A sample of 49 past customers is taken. The average delivery time in the sample was 16.2 days with a standard deviation of 5.6 days. a) Test the claim of the company at the 5% level of significance. b) compute the probability of a Type II error if the true average delivery time is 17 days after purchase.
Question 2 1251 NICTUS furniture claims that the standard deviation in their delivery time is less...
Question 2 1251 NICTUS furniture claims that the standard deviation in their delivery time is less than 5 days. A sample of 30 past customers is taken. The average delivery time in the sample was 15 days with a sample standard deviation 5 days a. b. c. d Construct a 95% confidence interval for the population variance Construct a 90% confidence interval for the population standard deviation. State the null and alternative hypotheses to be tested. Test the company's claim...
83 - A company selling licenses for new e-commerce computer software advertises that firms using this...
83 - A company selling licenses for new e-commerce computer software advertises that firms using this software obtain, on average during the first year, a yield of 9% on their initial investments. A random sample of 10 of these franchises produced the yields shown below for the first year of operation 72 9.5 11.3 8.7 12.9 3.2 8.6 10.4 98 Assuming that population yields are normally distributed, test the company's claim at the 1% significance level Click the loon to...
A) The production supervisor of an assembly line for producing potato chips suspects that the weight of bags of potato c...
A) The production supervisor of an assembly line for producing potato chips suspects that the weight of bags of potato chips produced is higher than the specification of 250 mg. She would like to take a simple random sample of bags of potato chips produced by the assembly line and perform a statistic test to confirm that this is indeed the case. (6 points) What would be the null and alternative hypothesis for this research? What is the type I...
Suppose a university advertises that its average class size is 35 or less. A student organization...
Suppose a university advertises that its average class size is 35 or less. A student organization is concerned that budget cuts have led to increased class sizes and would like to test this claim. A random sample of 43 classes was selected, and the average class size was found to be 36.1 students. Assume that the standard deviation for class size at the college is 7 students. Using α=0.10, complete parts a - e below. a) Determine the null and...
32. Ten years ago the mean number of days of skill training per year provided to...
32. Ten years ago the mean number of days of skill training per year provided to employees by American businesses was 13.2. A researcher believes it to be less now. Test this assertion at the 1% level of significance, using the following information: a random sample of 49 major employers produced a mean number of days of skill training per year of 11.9 days, with standard deviation 3.4 days. (a) State the null and alternative hypotheses for the test. (b)...
A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to...
A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 30 minutes. A sample of 36 orders using the new delivery process yields a sample mean of 27.3 minutes and a sample standard deviation of 6 minutes. Complete parts (a) through (d) below. a. Using the critical value approach, at the 0.05 level of significance, is there evidence that the...
A carpet company advertises that it will deliver your carpet within 15 days of purchase. 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 (0) is known to be 5.6 days. a. State the null and alternative hypotheses for a test to determine if their advertisement is legitimate. b. Using the critical value approach, test the hypotheses. Let a = .05. C. Using the p-value...
Question 3 A carpet company advertises that it will deliver your carpet within 15 days of purchase. A sample of 49 past customers is taken. The average delivery time in the sample was 16.2 days. Assume the population standard deviation is known to be 5.6 days. a. State the null and alternative hypotheses. b. Using a critical value, test the null hypothesis at the 5% level of significance. c. Using a p-value, test the hypothesis at the 5% level of...
Question 2 1251 NICTUS furniture claims that the standard deviation in their delivery time is less than 5 days. A sample of 30 past customers is taken. The average delivery time in the sample was 15 days with a sample standard deviation 5 days a. b. c. d Construct a 95% confidence interval for the population variance Construct a 90% confidence interval for the population standard deviation. State the null and alternative hypotheses to be tested. Test the company's claim...
83 - A company selling licenses for new e-commerce computer software advertises that firms using this software obtain, on average during the first year, a yield of 9% on their initial investments. A random sample of 10 of these franchises produced the yields shown below for the first year of operation 72 9.5 11.3 8.7 12.9 3.2 8.6 10.4 98 Assuming that population yields are normally distributed, test the company's claim at the 1% significance level Click the loon to...
32. Ten years ago the mean number of days of skill training per year provided to employees by American businesses was 13.2. A researcher believes it to be less now. Test this assertion at the 1% level of significance, using the following information: a random sample of 49 major employers produced a mean number of days of skill training per year of 11.9 days, with standard deviation 3.4 days. (a) State the null and alternative hypotheses for the test. (b)...
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