Hypothesis testing The following data are from an experiment designed to investigate the perception of corporate ethical values among individuals specializing in marketing (higherscores indicate higher ethical values).MarketingMarketingManagersAdvertisingResearch37446.6.56.57476.5(a) Use a = 0.05 to test for significant differences in perception among the three groups.State the null and alternative hypotheses.Ho:: At least two of the population means are equal.H: At least two of the population means are different.Ho: HMM = HMR = HAHa: Not all the population means are equal.Ho: HMM + HMR + HAHa: HMM = HMR = HA%DO Ho: HMM = HMRHa: HMM + HMR * HAHA%DHo: Not all the population means are equal.Ha: HMM = HMR = HA Find the value of the test statistic.19Find the p-value. (Round your answer to three decimal places.)p-value= 0.001State your conclusion.Reject Ho. There is not sufficient evidence to conclude that the mean perception score is not the same for the three groups of specialists.Do not reject Ho. There is sufficient evidence to conclude that the mean perception score is not the same for the three groups ofspecialists.Reject Ho. There is sufficient evidence to conclude that the mean perception score is not the same for the three groups of specialists.Do not reject Ho. There is not sufficient evidence to conclude that the mean perception score is not the same for the three groups ofspecialists.(b) At the a = 0.05 level of significance, we can conclude that there are differences in the perceptions for marketing managers, marketing research specialists, andadvertising specialists. Use the procedures in Section 13.3 to determine where the differences occur. Use a = 0.05. (Use the Bonferroni adjustment.)Find the value of LSD. (Round your comparisonwise error rate to four decimal places. Round your answer to three decimal places.)LSD = 3.167Find the pairwise absolute difference between sample means for each pair of treatments.XMM - XMR2.5|XMMХА1XMR= 1.5

Answered: Image /qna-images/answer/169d35a6-3290-4121-b958-efa043ce14c3.jpg

The following data are from an experiment designed to investigate the perception of corporate ethical values among individuals specializing in marketing (higher scores indicate higher ethical values). Marketing Managers Marketing Research Advertising 3 7 4 4 6 6 5 5 5 5 4 7 3 (a) Use a = 0.05 to test for significant differences in perception among the three groups. State the null and alternative hypotheses. Ho: At least two of the population means are equal. H: At least two of the population means are different. O Ho: HMM = HMR = HA Ha: Not all the population means are equal. Hoi MMM * HMR * HA Ha: HMM = HMR = HA Ho: HMM = HMR = HA Ha: HMM + HMR * HA Ho: Not all the population means are equal. Ha: HMM = HMR = HA

The following data are from an experiment designed to investigate the perception of corporate ethical values among individuals specializing in marketing (higher scores indicate higher ethical values). Marketing Managers Marketing Research Advertising 3 7 4 4 6 6 5 5 5 5 4 7 3 (a) Use a = 0.05 to test for significant differences in perception among the three groups. State the null and alternative hypotheses. Ho: At least two of the population means are equal. H: At least two of the population means are different. O Ho: HMM = HMR = HA Ha: Not all the population means are equal. Hoi MMM * HMR * HA Ha: HMM = HMR = HA Ho: HMM = HMR = HA Ha: HMM + HMR * HA Ho: Not all the population means are equal. Ha: HMM = HMR = HA

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

Hypothesis Testing- 2 samples Ten individuals went on a low-fat diet for 12 weeks to lower their cholesterol. The data are recorded in the table below. Do you think that their cholesterol levels were significantly lowered? Conduct a hypothesis test at the 5% level. Starting cholesterol level Ending cholesterol level 140 140 220 240 110 130 240 220 200 190 180 150 190 200 360 300 280 300 260 240 NOTE: If you are using a Student's t-distribution for the problem, including for paired data, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) Part 1) State the distribution to use for the test. (Enter your answer in the form z or tdf where df is the degrees of freedom.) Part 2) What is the test statistic? (If using the z distribution round your answer to two decimal places, and if using the t distribution round your answer to three decimal places.) z or t= _______ Part 3) What is the…
Part 1-3
In hypothesis testing, if you find significance, does that mean that your study has meaning? Explain. _______________________________________________
What are H0 and Ha Calculate d Calculate sd Find standardized test statistic Calculate P value __ the results ___ the same thing as using the critical value approach. ____ the null hypothesis. There _____ enough evidence to ____ the claim that pass completion percentages have ______.
R & A II, Chapter 11 Practice A music teacher hypothesized that singing with hand movements about math will improve the math scores of elementary school children. To test her hypothesis, the teacher obtained permission from 10 parents of Dixie Bee Elementary school children to give their children an extra 30 minutes of singing (about math) instruction at the end of the school day. The 10 children were first given a standard math test by their music teacher. Then they received 30 minutes of singing time with their music teacher, once a week, for 6 weeks. The 30 minute sessions included singing and dancing to songs about math. At the end of the 6 weeks period, the music teacher gave the children the same math test again. Below are the pretest and posttest scores for the 10 children. There were 10 questions on the math test. Participant # Posttest Score. 6 5 7 1 2 3 4 5 6 7 8 Pretest Score 5 4 7 3 2 8 8 2 5 4 5 7 9 5 7 9 Change in Score +1 +1 0 +1 +3 -1 +1 +3 +2 +2 9 10 Mean Score 5.1…
18-34 35-49 50-64 65+ Burger King 127 119 63 163 McDonald's 75 142 82 129 Wendy's 124 156 75 132
Subject Location Reading Math Science Is achieving a basic skill level related to the location of the school? The results of a random sample of students by the location of school and the number of students achieving basic skill levels in three subjects is shown in the contingency table. At a = 0.01, test the hypothesis that the variables are independent. Complete parts (a) through (d). Urban 48 41 39 Suburban 70 63 64 (a) Identify the claim and state the null and alternative hypotheses. Ho: Skill level in a subject is location. Ha: Skill level in a subject is location. The is the claim. (b) Calculate the test statistic. If convenient, use technology. %3D (Round to three decimal places as needed.) (c) Decide to reject or fail to reject the null hypothesis. Then interpret the decision in the context of the original claim. Choose the correct conclusion below. O A. Reject the null hypothesis. There is not enough evidence to reject the claim that skill level in a subject is independent of…
escription nstructions Aultiple Attempts This test allows multiple attempts. Section 6.2 Force Completion This test can be saved and resumed later. Your answers are saved automatically. - Question Completion Status: QUESTION 1 In a survey of 380 households regarding the ownership of VCRS and DVD players, the following data was obtained: 350 households own one or more VCRS. 180 households own one or more VCRS and one or more DVD players. 13 households do not own a VCR or a DVD player. How many households only own one or more DVD players? O a. 16 households O b.29 households Oc. 30 households O d. 20 households O e. 19 households Of 17 households QUESTION 2 On a certain day, the Wilton County Jail had 184 prisoners. Of these, 128 were accused of felonies, and 117 were accused of misdemea Chck Save and Submit to save and submir. Click Sare All Answers to save all ansuers. earch
Hypothesis test For a certain nationwide standardized test there are two commonly used preparation products on the market: StudyFocus and Prepara. A researcher in the Education department at a nearby university wants to determine if there is any difference between the two products on the mean score on the test by their users. The researcher obtains the scores on the test from a random sample of 16 users of StudyFocus and a random sample of 14 users of Prepara. (These samples are chosen independently.) These data are shown in the table. ? StudyFocus Prepara Send data to calculator 408, 400, 460, 587, 485, 559, 470, 439, 453, 531, 491, 481, 529, 494, 581, 397 510, 553, 504, 525, 549, 500, 525, 561, 510, 493, 498, 512, 517, 546 V Scores Send data to Excel Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) Explanation Assume that the two populations of scores are…
Part A
Statistics question