TreatmentShamH2Researchers conducted a study to determine whether magnets are effective in treating back pain. The results are shown in the table for the treatment (with magnets) group and the sham (or placebo) group. Theresults are a measure of reduction in back pain. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standarddeviations are equal. Complete parts (a) and (b) below.22220.530.440.531.27a. Use a 0.05 significance level to test the claim that those treated with magnets have a greater mean reduction in pain than those given a sham treatment.What are the null and alternative hypotheses?O A. Ho: H1< H2H1: H1 2 H2O B. Ho: H1 = H2H1: 41> H2C. Ho: H1 = H2H1: Hy # H2D. Ho: H1 + H2H1: H1 b. Construct a confidence interval suitable for testing the claim that those treated with magnets have a greater mean reduction in pain than those given a sham treatment.

n1 = n2 = 22 x1 =0.53x2 = 0.44 s1 = 0.53s2= 1.27a) Option b) is correct. The null and alternative hypotheses are H0: u1 = u2H1: u1 > u2 b) The test statistic is given by p-value= 0.3803 Fail to reject the null hypothesis. There is not sufficient evidence the support the claim.The 95% CI is given by

Math

Statistics

a. Use a 0.05 significance level to test the claim that those treated with magnets have a greater mean reduction in pain than those given a sham treatment. What are the null and alternative hypotheses? O A. Ho: H1 H2 H: H1 2 H2 OC. Ho: H1 =H2 OD. Ho: H1 P2 H1: H1

a. Use a 0.05 significance level to test the claim that those treated with magnets have a greater mean reduction in pain than those given a sham treatment. What are the null and alternative hypotheses? O A. Ho: H1 H2 H: H1 2 H2 OC. Ho: H1 =H2 OD. Ho: H1 P2 H1: H1

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

1. Calculate r2 2. Interpret r2 in the context of this research. How large is this effect (small, medium, large)? 3. Make an statistical decision about the null using alpha =.05. Will you reject or retain the null based on your data? 4. Provide a conclusion of the data using Descriptive statistics and the context of the research.
In their advertisements, a new diet program would like to claim that their methods result in a mean weight loss of more than ten pounds in two weeks. In order to determine if this is a valid claim, they hire an independent testing agency that then selects twenty-five people to be placed on this diet. Which of the following is the correct hypotheses? a Ho: μ- 10 Ha: μ > 10 Ho: u > 10 Ha: u = 10 Ho: U = 10 Ha: u < 10 O d Ho: p = 10 Ha: u+ 10
In testing a certain kind of truck tire over rugged terrain, it is found that 39% of the trucks fail to complete the test run without a blowout. Of the next 15 trucks tested, find the probability that at least 3 trucks have blowouts.
State the Result: A hypothesis test was conducted at the alpha = 0.01 level of significance. The test resulted in a p-value of 0.044.
A research group wants to estimate the proprtion, p, of americans who can speak a language other than English. By referencing past data, the group belive that more than 45% of Americans can do so. a. state the null and alternative hypotheses for testing the group's belief/ b. If the value of the test statistic is approximately 1.46, what is the conslusion (reject H0 of fail to reject H0) of the hypotesis test? with a-0.05 c. If the true balue of is 48%, did the researchers make an error? if so what type?
A test of Ho! H=50 versus H₁;M #50 is performed using a significance level of α = 0.01. The value of the test statistic is z = 1.23 A) is H₂ rejected? B) if the true value of his 65, is the results a Type I error, a Type II error, or a correction ?
econometrics
You may need to use the appropriate technology to answer this question. Submitted The following table contains observed frequencies for a sample of 200. Column Variable Row Variable A B C P 20 44 50 Q 30 26 30 Test for independence of the row and column variables using a = 0.05. State the null and alternative hypotheses. Ho: The column variable is independent of the row variable. H: The column variable is not independent of the row variable. Ho: Variable P is not independent of variable Q. H: Variable P is independent of variable Q. Ho: Variable P is independent of variable Q. H: Variable P is not independent of variable Q. : The column variable is not independent of the row variable. Ho: : The column variable is independent of the row variable. Find the value of the test statistic. (Round your answer to three decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value %3D State your conclusion. Reject Ho. We conclude that the column and row variables are…
11.10
What is the answer?
Test the daim that the proportion of men who own cats is significan tly different than the proportion of women who own cats at the 0.02 significance level. The null and alternative hypothesis would be: Ho:PM = PF Ho:HM PF Ho:PM µp H1:µM PF H1:µM + HF The test is left-tailed two-tailed right-tailed Based on a sample of 80 men, 40% owned cats Based on a sample of 20 women, 50% owned cats positive Critical Value = [three decimal accuracy] Test Statistic = [three decimal accuracy] Based on this we: O Reject the null hypothesis O Fail to reject the null hypothesis
A test of the null hypothesis Ho: p = .25 gives a test statistic z = 1.6. What is the p-value if the alternative is Ha: p > .25? What is the p-value if the alternative is Ha: p < .25? What is the p-value if the alternative is Ha: p .25?