Suppose you want to compare two treatments, A and B. Use the Wilcoxon rank-sum test to determine whether the distribution for population B is shifted to the right of the distribution for population A.
a. Specify the null and alternative hypotheses you would test.
b. Suppose you obtained the independent random samples of observations on experimental units subjected to the two) treatments shown in the table to the right. Conduct a test of the hypotheses described in part a. Test using α=0.025 .
Homework Answers
30 21 == ននន 22 Suppose you want to compare two treatments, A and B. Use...
30 21 == ននន 22 Suppose you want to compare two treatments, A and B. Use the Wilcoxon rank sum test to determine whether the distribution for population is shifted to the left of the distribution for population Sample Sample a. Specify the null and alternative hypotheses you would test. b. Suppose you obtained the independent random samples of observations on experimental units subjected to the two treatments shown in the table to the night. Conduct atest of the hypotheses...
Suppose you want to use the Kruskal-Wallis H-test to compare the probability distributions of three populations....
Suppose you want to use the Kruskal-Wallis H-test to compare the probability distributions of three populations. The following are independent random samples selected from the three populations: I: 66, 23, 55, 88, 58, 62, 79, 49 II: 19, 31, 16, 29, 30, 33, 40 III: 75, 96, 102, 75, 98, 78 What type of experimental design was used? Specify the null and alternative hypotheses you would test. Specify the rejection region you would use for your hypothesis test at α...
1) Answer the question True or False. 1) Nonparametric methods focus on the location of the...
1) Answer the question True or False. 1) Nonparametric methods focus on the location of the probability distribution, rather than on specific parameters of the population. A) True B) False 2) Nonparametric tests are useful for qualitative data that can be ranked. A) True B) False 3) The sign test provides inferences about the population median rather than the population mean. A) True B) False 4) For a sign test to be valid, a large sample must be selected from...
Suppose you want to use the Kruskal-Wallis H-test to compare the probability distributions of thr...
Suppose you want to use the Kruskal-Wallis H-test to compare the probability distributions of three populations. The following are independent random samples selected from the three populations: l: 66, 23, 55, 88, 58, 62, 79,49 Il: 19, 31, 16, 29, 30, 33, 40 IlIl: 75, 96, 102, 75, 98, 78 a. What type of experimental design was used? b. Specify the null and alternative hypotheses you would test. c. Specify the rejection region you would use for your hypothesis test...
please help with all parts Question Help Suppose you want to test a hypothesis that two...
please
help with all parts
Question Help Suppose you want to test a hypothesis that two treatments A and B, are equivalent against the alternative hypothesis that the responses for Atend to be larger than those for B. You plan to use a paired ofference experiment and to analyze the resulting data shown in the accompanying datatable, with the Wilcoxon signed rankos. Complete partea and b. Click the loon to view the datatable Click the leon to view a table...
Answer the question True or False. 15) The Wilcoxon rank sum test is used to test...
Answer the question True or False. 15) The Wilcoxon rank sum test is used to test the hypothesis that the probability distributions associated with two populations are equivalent. A) True B) False 16) The Wilcoxon rank sum test is recommended for comparing discrete distributions. A) True B) False 17) 17) When performing a rank test comparing two populations, we rank the sample observations from both populations as though they were drawn from the same population. A) True B) False 18)...
Suppose the Total Sum of Squares (SST) for a completely randomzied design with ?=6k=6 treatments and...
Suppose the Total Sum of Squares (SST) for a completely randomzied design with ?=6k=6 treatments and ?=18n=18 total measurements is equal to 500500. In each of the following cases, conduct an ?F-test of the null hypothesis that the mean responses for the 66 treatments are the same. Use ?=0.025α=0.025. (a) The Treatment Sum of Squares (SSTR) is equal to 350350 while the Total Sum of Squares (SST) is equal to 500500. The test statistic is?=F= The critical value is ?=F=...
Suppose you wish to conduct a test of the research hypothesis that the median of a population is ...
Not sure of my answers
Suppose you wish to conduct a test of the research hypothesis that the median of a population is greater than 73. You randomly sample 20 measurements from the population and determine that 13 of them exceed 73. Set up and conduct thee appropriate test of hypothesis at the 0.10 level of significance. Be sure to specify all necessary assumptions. What are the null and alternative hypotheses for this hypothesis tast? OA. Ho: n-13 He :...
Suppose you want to test the following hypotheses: H0: p ≥ 0.4 vs. H1: p <...
Suppose you want to test the following hypotheses: H0: p ≥ 0.4 vs. H1: p < 0.4. A random sample of 1000 observations was taken from the population. Answer the following questions and show your Excel calculation for each question clearly: (a) Let p ̂ be the sample proportion. What is the standard error of sample proportion (i.e., σ_p ̂ ) if H0 is true? (b) If the sample proportion obtained were 0.38 (i.e., p ̂=0.38), what is its p-value?...
Suppose the Total Sum of Squares (SST) for a completely randomzied design with k=6 treatments and...
Suppose the Total Sum of Squares (SST) for a completely randomzied design with k=6 treatments and n=24 total measurements is equal to 400. In each of the following cases, conduct an FF-test of the null hypothesis that the mean responses for the 66 treatments are the same. Use α=0.01. (a) The Treatment Sum of Squares (SSTR) is equal to 200 while the Total Sum of Squares (SST) is equal to 400. The test statistic is F= The critical value is...
30 21 == ននន 22 Suppose you want to compare two treatments, A and B. Use the Wilcoxon rank sum test to determine whether the distribution for population is shifted to the left of the distribution for population Sample Sample a. Specify the null and alternative hypotheses you would test. b. Suppose you obtained the independent random samples of observations on experimental units subjected to the two treatments shown in the table to the night. Conduct atest of the hypotheses...
1) Answer the question True or False. 1) Nonparametric methods focus on the location of the probability distribution, rather than on specific parameters of the population. A) True B) False 2) Nonparametric tests are useful for qualitative data that can be ranked. A) True B) False 3) The sign test provides inferences about the population median rather than the population mean. A) True B) False 4) For a sign test to be valid, a large sample must be selected from...
Suppose you want to use the Kruskal-Wallis H-test to compare the probability distributions of three populations. The following are independent random samples selected from the three populations: l: 66, 23, 55, 88, 58, 62, 79,49 Il: 19, 31, 16, 29, 30, 33, 40 IlIl: 75, 96, 102, 75, 98, 78 a. What type of experimental design was used? b. Specify the null and alternative hypotheses you would test. c. Specify the rejection region you would use for your hypothesis test...
please
help with all parts
Question Help Suppose you want to test a hypothesis that two treatments A and B, are equivalent against the alternative hypothesis that the responses for Atend to be larger than those for B. You plan to use a paired ofference experiment and to analyze the resulting data shown in the accompanying datatable, with the Wilcoxon signed rankos. Complete partea and b. Click the loon to view the datatable Click the leon to view a table...
Answer the question True or False. 15) The Wilcoxon rank sum test is used to test the hypothesis that the probability distributions associated with two populations are equivalent. A) True B) False 16) The Wilcoxon rank sum test is recommended for comparing discrete distributions. A) True B) False 17) 17) When performing a rank test comparing two populations, we rank the sample observations from both populations as though they were drawn from the same population. A) True B) False 18)...
Not sure of my answers
Suppose you wish to conduct a test of the research hypothesis that the median of a population is greater than 73. You randomly sample 20 measurements from the population and determine that 13 of them exceed 73. Set up and conduct thee appropriate test of hypothesis at the 0.10 level of significance. Be sure to specify all necessary assumptions. What are the null and alternative hypotheses for this hypothesis tast? OA. Ho: n-13 He :...
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