To test whether there is any difference between mean tire-tread life due to driv

Question

To test whether there is any difference between mean tire-tread life due to driving, fifteen similar cars were each driven under one of three conditions: city, highway, country. The tread wear then determined for each car. The number of degrees of freedom for the F-test is: In testing for gender differences in online clothing purchaser sample of 40 females and 40 males were surveyed to determine the percent of each who had made online clothing purchaser in the last month. If 16% of females and 10% of male* responded favorably. which test should be to test for gender differences? A a t-test with df = 78 B. a t-test with df = 39 C an F-test D. a z-test For the multiple regression equation y = 93 + 26x_1 - 12x_3 if x_3, were to increase by 10, the estimated value of y would A. increase by 10. B. increased by 120. C decrease b 120. D. decreased by 12/120. When we wish to statistically test whether or not the means of more than two population may be considered equal, we may use: A. prediction intervals. B simple linear regression C. a chi-square test. D. point estimates E. analysis of variance When we wish to statistically test whether or not the proportions of more than two populations may be considered equal, we may use A prediction intervals B. simple linear regression C. a chi-square test D. point of variance E. analysis of variance The area to the right of a chi-square value is 0 05. For 5 degrees of freedom. the table value is A. 9.236 B. 9.488 C. 11.070 D. 11.143 E. 12.833 The area to the right of a R-value it 0.10. The table value is: A. 1.282 B. 1.645 C. 1.96 D. 2326 E. 2576 The area to the right of a t-value it 0.05. For 10 degrees of freedom, die table value a is A 1.372 B. 1.812 C. 1.645 D. 1.833 F. 2 228

Explanation / Answer

The following are the correct of th given multiple choices.

26. Answer is D.

27. Answer is C.

28. Answer is C.

29. Answer is E.

30. Answer is A.

31. Answer is C.

32. Answet is A.

33. Answer is B.

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