16. Which of the following will increase the power of a statistical test?Change a from .05 to .01.b. Change from a one-tailed test to a two-tailed test.c. Change the sample size from n = 100 to n = 25.d. None of the other options will increase power.a.17. In a hypothesis test involving a population mean, which of the following would be anacceptable formulation?H.:x<$1,700H.:x> $1,700a.H.:µ> $1,700H.:µ2 $1,700b.H, :µ<$1,700H.:µ> $1,700C.d.None of the above is acorrect formulation.

Answered: Image /qna-images/answer/94be6960-5a4b-46e7-a5c9-8e80cc5f847f.jpg

Answered: 16. Which of the following will…

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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mber This will jus. A data set includes data from student evaluations of courses. The summary statistics are n= 88, x=4.09, s 0.66. Use a 0.05 significance level to test the claim that the population of student course evaluations has a mean equal to 4.25. Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. What are the null and alternative hypotheses? O A. Ho: H=4.25 Ημ 4.25 O B. H: p=4.25 Hp p*4.25 O C. Ho: u#4.25 H: =4.25 O D. Ho p=4.25 H: p>4.25 Determine the test statistic. - 1.85 (Round to two decimal places as needed.) Determine the P-value. (Round to three decimal places as needed.) State the final conclusion that addresses the original claim. V Ho. There is evidence to conclude that the mean of the population of student course evaluations is equal to 4.25 correct.
We want to be at least 95% confident that the error is at most 0.06, then the sample size is.. A. 215 B. 267 C. 313 D. 425 E. None of the above
Suppose you estimate that approximately 8% of students on campus smoke. You decide to do a study about smoking and you randomly recruit 250 students to participate. a . Estimate the mean and st. deviation for this binomial situation. b. Would you be surprised if your sample contained 26 smokers? Why or why not? c. Would you be surprised if your sample contained 16 smokers? Why or why not? d. Would you be surprised if your sample contained 33 smokers? Why or why not?
A sample of 100 adult women was taken, and each was asked how many children she had. The results were as follows: Children 0 1 2 3 4 5 Number of Women 27 22 30 12 7 2 a. Find the sample mean number of children. b. Find the sample standard deviation of the number of children. c. Find the sample median of the number of children. d. What is the first quartile of the number of children? e. What proportion of the women had more than the mean number of children? f. For what proportion of the women was the num- ber of children more than one standard deviation greater than the mean? g. For what proportion of the women was the num- ber of children within one standard deviation of the mean?
27. Which is cheaper: eating out or dining in? The mean cost of a flank steak, broccoli, and rice bought at the grocery store is $13.04 (Money.msn website, November 7, 2012). A sample of 100 neighborhood restaurants showed a mean price of $12.75 and a standard deviation of $2 for a comparable restaurant meal. a. Develop appropriate hypotheses for a test to determine whether the sample data port the conclusion that the mean cost of a restaurant meal is less than fixing a com- st sup- parable meal at home. b. Using the sample from the 100 restaurants, what is the p-value? At a = .05, what is your conclusion? Repeat the preceding hypothesis test using the critical value approach. с. || d.
Assume that you want to test the claim that the paired sample data below come from a population from which the mean difference is zero. Using JMP, compute the value of the appropriate test statistic. Do the data appear to come from a population where the mean difference is zero? X: 28 35 25 25 32 30 28 37 Y: 26 31 31 25 33 35 28 33 a. No b. O c. Yes d.
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The prices of a sample of books at University A were obtained by two statistics students. Then the cost of books for the same subjects (at the same level) were obtained for University B. Assume that the distribution of differences is Normal enough to proceed, and assume that the sampling was random. a. First find both sample means and compare them. b. Test the hypothesis that the population means are different, using a significance level of 0.05. E Click the icon to view the table of prices. a. Find the sample mean for University A. (Round to the nearest cent as needed.) Find the sample mean for University B. (Round to the nearest cent as needed.) Compare the sample means. The sample mean is larger at b. Determine the hypotheses for this test. Let Hdifference be the mean of differences between the paired observations. Choose the correct answer below. OB. Ho: Hdifference 0 O E. Ho: Hdifference >0 = 0 Ha: Hdifference =0 Data Table #0 Find the test statistic for this test. %3= = (Round to…
Explain how each of the following influences the value of the z-score in a hypothesis test a. increasing the difference between the sample mean and the original population mean b. increasing the population standard deviation c. increasing the number of scores in the sample
Find A. Hypothesis and identify claim B. Compute test value C. Find p value D. Make decision E. Summarize results
6. A sample of 100 adult women was taken, and each was asked how many children she had. The results were as follows: Children 0 Number of 24 Women 1 20 2 35 3 13 4 7 5 1 a. Find the sample mean number of children. b. Find the sample standard deviation of the number of children. c. Find the sample median of the number of children. d. What is the first quartile of the number of children? e. What proportion of the women had more than the mean number of children? f. For what proportion of the women was the number of children more than one standard deviation greater than the mean? g. For what proportion of the women was the number of children within one standard deviation of the mean?
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