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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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
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
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.)
3.
For each of the following hypotheses in Questions 6-8, (i) provide the p-value (or its bounds) and (ii) draw a basic conclusion (REJECT or DO NOT REJECT only) with respect to Ho with 99% confidence. Handwritten notes are not necessary for these questions.
To test whether the mean time needed to mix a batch of material is the same for machines produced by three manufacturers, the Jacobs Chemical Company obtained the following data on the time (in minutes) needed to mix the material. Compute the values below (to 2 decimals, if necessary). Sum of Squares, Treatment Sum of Squares, Error Mean Squares, Treatment Mean Squares, Error Calculate the value of the test statistic (to 2 decimals). 1 19 25 23 21 Manufacturer a. Use these data to test whether the population mean times for mixing a batch of material differ for the three manufacturers. Use a = 0.05. What conclusion can you draw after carrying out this test? - Select your answer - 2 30 28 33 29 3 21 20 24 23 The p-value is - Select your answer - V What is your conclusion? - Select your answer - b. At the a= 0.05 level of significance, use Fisher's LSD procedure to test for the equality of the means for manufacturers 1 and 3. Calculate Fisher's LSD Value (to 2 decimals).

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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