6. The Ministry of Health reports that the average cost of rehabilitation for earthquake victims is $25,750. To see if the average cost of rehab is different at a particular hospital, a researcher selects a random sample of 144 earthquake victims at the hospital and finds the average cost of their rehab is $25,250. The standard deviation of the normally- distributed population is $3250. Test the null hypothesis that the average cost of earthquake rehabilitation at a particular hospital is $25,750 against a two-sided alternative. Test statistics is 1.85; we reject the null hypothesis at all significance levels greater than -6.44%. Test statistics is – 1.85; we reject the null hypothesis at all significance levels greater than -3.22%. Test statistics is – 1.85; we reject the null hypothesis at all significance levels smaller than -6.44%. Test statistics is – 1.85; we reject the null hypothesis at all significance levels greater than -6.44%. Test statistics is 1.85; we reject the null hypothesis at all significance levels greater than -3.22%. Test statistics is 1.85; we reject the null hypothesis at all significance levels smaller than -3.22%.

6. The Ministry of Health reports that the average cost of rehabilitation for earthquake victims is $25,750. To see if the average cost of rehab is different at a particular hospital, a researcher selects a random sample of 144 earthquake victims at the hospital and finds the average cost of their rehab is $25,250. The standard deviation of the normally- distributed population is $3250. Test the null hypothesis that the average cost of earthquake rehabilitation at a particular hospital is $25,750 against a two-sided alternative. Test statistics is 1.85; we reject the null hypothesis at all significance levels greater than -6.44%. Test statistics is – 1.85; we reject the null hypothesis at all significance levels greater than -3.22%. Test statistics is – 1.85; we reject the null hypothesis at all significance levels smaller than -6.44%. Test statistics is – 1.85; we reject the null hypothesis at all significance levels greater than -6.44%. Test statistics is 1.85; we reject the null hypothesis at all significance levels greater than -3.22%. Test statistics is 1.85; we reject the null hypothesis at all significance levels smaller than -3.22%.

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Insurance Company A claims that its customers pay less for car insurance, on average, than customers of its competitor, Company B. You wonder if this is true, so you decide to compare the average monthly costs of similar insurance policies from the two companies. For a random sample of 13 people who buy insurance from Company A, the mean cost is $150 per month with a standard deviation of $19. For 9 randomly selected customers of Company B, you find that they pay a mean of $157 per month with a standard deviation of $16. Assume that both populations are approximately normal and that the population variances are equal to test Company A's claim at the 0.05 level of significance. Let customers of Company A be Population 1 and let customers of Company B be Population 2. Step 2 of 3: Compute the value of the test statistic. Round your answer to three decimal places.
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