15. b. Identify the test statistic c. The P-value for this hypothesis test is A 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field.She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placingtheir hand just under her hand without seeing it and without touching it. Among 277 trials, the touch therapists were correct 113 times. Usea 0.01 significance level to test the claim that touch therapists use a method equivalent to random guesses. Do the results suggest thattouch therapists are effective?

given data clim : p = 0.50n = 277x = 113α = 0.01p^ = xn = 113277 = 0.4079

Answered: A 9-year-old girl did a science fair…

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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Perform the test of hypothesis on the following scenarios. A brand of powdered milk is advertised as having a net weight of 250 grams. A curious consumer obtained the net weight of 10 randomly selected cans. The values obtained are 256, 248, 242, 245, 246, 248, 250, 255, 243, and 249 grams. Is there reason to believe that the average net weight of the powdered milk cans is less than 250 grams at 10% level of significance? Assume the net weight is normally distributed with unknown population variance. Note: pls follow the given steps in the photo attached
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B. Identify the test statistic Z=___ C. Identify the P-value. P-value=___ D. What is the conclusion based on the hypothesis test? The P-value is (greater than/less than) the significance level of α=0.01,so (reject/ fail to reject) the null hypothesis. There is (suffiecient/ insufficient) evidence to support the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Test the claim by constructing an appropriate confidence interval. The 90% confidence interval is ___<( p1-p2)<___ E. Because the confidence interval limits (do not include/include) 0, it appears that the two proportions are (equal/not equal) Because the confidence interval limits include (only negative/ only positive/ negative and positive) values, it appears that the proportion of people over 55 who dream in black and white is (greater than/less than/ not significantly different from) the proportion for those under 25. F. An explanation…
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a. Let p denote the population proportion of correct hand selections by touch therapists. Identify the null and alternative hypotheses to test the claim that touch therapists use a method equivalent to random guesses. b. Identify the test statistic. c. Identify the P-value. d. State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. Address whether the results suggest that touch therapists are effective.
Passed Failed o Results from a civil servant exam are shown in the table to the right. Is there sufficient evidence to support the claim that the results from the test are discriminatory? Use a 0.01 significance level. White 15 16 candidates Minority candidates 10 24 Determine the null and alternative hypotheses. O A. Hn: Awhite candidate is more likely to pass the test than a minority candidate H, A white candidate is not more likely to pass the test than a minority candidate. O B. Ho: White and minority candidates have the same chance of passing the test H,: White and minority candidates do not have the same chance of passing the test O C. Ho: White and minority candidates do not have the same chance of passing the test. H,: White and minority candidates have the same chance of passing the test. O D. Ho: Awhite candidate is not more likely to pass the test than a minority candidate. H: Awhite candidate is more likely to pass the test than a minority candidate. Determine the test…
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49
4. A corporate lawyer wonders whether the vigor of antitrust enforcement differed in the 2010s com-pared to the 2000s. A sample of 10 firms is selected from the Fortune 500 list, and the data of table below are collected. Make an appropriate hypothesis test at the 5 percent level of significance using sign test. Number of Indictments (Charges) Firm 2000s 2010s A 8. 3 D 7 9. 10 9. F 15 20 18 12 7 8 12 J 3

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