The recent default rate on all student loans is 5.1 percent. In a recent random sample of 322 loans at private universities, there were 19 defaults. Does this sample show sufficient evidence that the private university loan default rate is below the rate for all universities, using a left- tailed test at a = 010? (a-1) Choose the appropriate hypothesis. а. Не 2.051; H: <.051. Accept H, if z<-2.326 b. Hg: 2.051; H: <.051. Reject Ha if z<-2.326 (a-2) Calculate the z-score for the sample data using a left-tailed test at a = .01. (A negative value should be indicated by a minus sign. Round your answer to 3 decimal places.) Zcalc

The recent default rate on all student loans is 5.1 percent. In a recent random sample of 322 loans at private universities, there were 19 defaults. Does this sample show sufficient evidence that the private university loan default rate is below the rate for all universities, using a left- tailed test at a = 010? (a-1) Choose the appropriate hypothesis. а. Не 2.051; H: <.051. Accept H, if z<-2.326 b. Hg: 2.051; H: <.051. Reject Ha if z<-2.326 (a-2) Calculate the z-score for the sample data using a left-tailed test at a = .01. (A negative value should be indicated by a minus sign. Round your answer to 3 decimal places.) Zcalc

Name: (a-3) Should the null hypothesis be rejected?YesNo(b) Calculate the p
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Description: (a-3) Should the null hypothesis be rejected?YesNo(b) Calculate the p-value. (Round your answer to 4 decimal places.)p-value(c) The assumption of normality is justified.YesNo The recent default rate on all student loans is 5.1 percent. In a recent r

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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A company manufactures tennis balls. When its tennis balls are dropped onto a concrete surface from a height of 100 inches, the company wants the mean height the balls bounce upward to be 54.7 inches. This average is maintained by periodically testing random samples of 25 tennis balls. If the t-value falls between - to 99 and to 99, then the company will be satisfied that it is manufacturing acceptable tennis balls. A sample of 25 balls is randomly selected and tested. The mean bounce height of the sample is 56.7 inches and the standard deviation is 0.25 inch. Assume the bounce heights are approximately normally distributed. Is the company making acceptable tennis balls? Find -to 99 and to.99- - to.99 = to.99 = (Round to three decimal places as needed.) Find the t-value. t-value = Is the company making acceptable tennis balls? Choose the correct answer below. O A. The tennis balls are not acceptable because the t-value falls outside -tn og and to oa.
You believe that your morning commute to UCLA is decreasing every week. You record thetime of 7 commutes (one for each day of the week) (in minutes) for the a one-week block and thenthe following one-week block. * Calculations have been done for you: the sample mean difference is -1.714 and the sample standarddeviation is 2.984. Conduct a hypothesis test at the α = 0.15 level. The mean difference calculated as the the first one-week block minus the second one-week block. That is to say week one minus week two. a. Set up the null and alternative hypothesis (using mathematical notation/numbers and interpretthem in context of the problem) b. Calculate the test statistic for the test from part a