25. Suppose that a researcher is interested in the effect of an exercise program on body weight among men. Theresearcher expects a treatment effect of 3 pounds after 15 weeks of exercise in the exercise program. In thepopulation, the mean adult body weight for men is μ = 195.5 pounds, o=42.0. For all of the following,assume that a = .05, two-tailed.a. State the null and alternative hypotheses using symbols.Answer +b. Compute the power of the hypothesis test for a sample n = 2,500.

Answered: Image /qna-images/answer/c2e63e4e-d119-4abf-9098-c7bfab3d7d4c.jpg

Answered: 25. Suppose that a researcher is int…

MATLAB: An Introduction with Applications

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ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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Ques Not 1. Final: United Motors claims that one of its cars, the Starbird 300, gets city driving mileages that are normally distributed with a mean of Mark 30 mpg and a standard deviation of 1 mpg. Let x denote the city driving mileage of a randomly selected Starbird 300. Assuming that United Motors' claim is correct, find P(x <= 27). O a. .00263 O b.00365 O c.00629 O d. ,00135 O e. None of the above Previous page tonl(moodla ku adu kwtcourse/view nhn?ida 16529
is it p=value is suppose to be 0.0401 not 0.0395 to according z-table of -1.75
A population has = 60 and = 10. Find the z-score corresponding to each of the following sample means: A sample of n = 4 with M = 55 A sample of n = 25 with M = 55 A sample of n = 100 with M = 55 What do we notice about the z-scores as the sample size changes
しり. Secと 4le D FIND THE INDICATED IQ SCORE, THE GRAPH DEPICTS TQ SORES NORMAUY DISTRIBUTED WITH MEAN OF 100 AND STANDARD DEVATON OF 15 O.1285 メ

Only number 55
6.) The mean weight for bags of chips is believed to be 16oz. A researcher believes that the actual mean weight is significantly lower than this. The researcher measures the weights of a sample of 31 bags, and finds that the mean of the sample is 15oz, with a sample standard deviation of 4oz. For  = 0.01, determine if the researcher is correct.a. State the null hypothesis and the alternative hypothesis.b. Is the test left-tailed, right-tailed, or two-tailed?c. Find the test value d. Find the critical value or p valuee. Should you reject the null hypothesis?f. Summarize the results
6
If an observation has a z-score of -1.5, how many standard deviations is it above or below the mean? O 0.066 standard deviations above the mean O 1.5 standard deviations above the mean O 1.5 standard deviations below the mean O 0.066 standard deviations below the mean
4A. * * ... docs.google.com الايجابة على اسئلة امتحان الدور الثاني 1:09 Classroom ► Q1) a) for the following data, (5, 64, 41, 7, 18, 40, 95), the Harmonic Mean (H) is 6 14.7647 O + 14.6747 14.7674 Q1) b) if (n+1)P3=nP4:, so the value of :n is none of all above (n + 1)P3 = nP4 3 4 5 none of all above ! 个
7. To test whether there is a significant difference in the mean weekly earnings between makes and females (i.e., whether gender affects mean earnings), you regress weekly earnings on a constant and a binary variable, which takes on a value of 1 for females and is 0 otherwise. The results were (standard errors are in the parentheses): 2 Ear 610.5+160.2Female, n=5000, R2 = 0.086 (9.4) (12.6) (a) Will you do a t or an F test? What is your conclusion? (b) Are these results evidence enough to argue that there is discrimination against females? Why or why not?
A personality test has a subsection designed to assess the "honesty" of the test-taker. Suppose that you're interested in the mean score, 4, on this subsection among the general population. You decide that you'll use the mean of a random sample of scores on this subsection to estimate u. What is the minimum sample size needed in order for you to be 95% confident that your estimate is within 2 of µ? Use the value 22 for the population standard deviation of scores on this subsection. Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.)
The mean and st deviation of 2 balls is given Ball1 ball2 Mean 4.2 3.4 St dev 1.4 1.6 Which of the ball is heavier Ball1 Ball2 Both are of same weight

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25. Suppose that a researcher is int researcher expects a treatment. population, the mean adult bod assume that a = .05, two-tailed a. State the null and alterna: Answer + b. Compute the power of the