OrderedBeforeAbsoluteRanksSign RankTreatmentValues ofDifferences91073856795647399A researcher is conducting a study on the palliative care patients at a specific facilityto determine how their chronic pain symptoms change after entering the palliativecare environment, in order to determine the effectiveness of the standardizedtreatment protocol for patients entering into the palliative care environment. To dothis the researcher is comparing the pain scores of individuals before treatment andafter treatment. Set up a Wilcoxon signed-ranks test and interpret it at the alphaequals .05 level.We reject Ho in favor of H₁, which states that the median difference in the painscores is not zero because the test statistic value of 35.5 is greater than thecritical value 11.We fail to reject Ho, which states the median difference in the pain scores is zerobecause the test static value of 35.5 is greater than the critical value of 11.We reject Ho in favor of H₁, which states that the median difference in the painscores is not zero because the test statistic value of 9.5 is less than the criticalvalue 11We fail to reject Ho, which states the median difference in the pain scores is zerobecause the test static value of 9.5 is less than the critical value of 11.Patient12345678AfterValue ofTreatment Differences45

Wilcoxon test is a non parametric test.

Answered: A researcher is conducting a study on…

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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Over the past year, the vice president of human resources at a large medical center conducted a series of three-month workshops aimed at increasing worker motivation and performance. As a check of effectiveness, she selected 7 employees from the personnel files and recorded their most recent annual performance ratings along with the ratings attained prior to attending the workshops. At a 5% level of significance, is there evidence that the workshops increased performance ratings? Take the differences = before - after. Before    After59            7272            7489            6267            7481            7888            9271            81Take the differences = before-after. Order the data smallest to largest, ignoring the negative signs. Rank the data from 1 to 7. Observation 5 had the values Before = 81 and After = 78. What is the difference before - after of these values? Answer=3What rank will observation 5 receive? Answer=2Add up all the ranks that have a negative difference,…
Healthcare workers who use latex gloves with glove powder on a daily basis are particularly susceptible to developing a latex allergy. Symptoms of a latex allergy include conjunctivitis, hand eczema, nasal congestion, a skin rash, and shortness of breath. Each in a sample of 46 hospital employees who were diagnosed with latex allergy based on a skin-prick test reported on their exposure to latex gloves (Current Allergy & Clinical Immunology, March, 2004). Summary statistics for a number of latex gloves used per week are = 19.3 and s = 11.9.    Form a 95% confidence interval for the average number of latex gloves used per week by all health care workers with a latex allergy. Form a 90% confidence interval for the average number of latex gloves used per week by all health care workers with a latex allergy. Please show step by step and formula used.
Healthcare workers who use latex gloves with glove powder on a daily basis are particularly susceptible to developing a latex allergy. Symptoms of a latex allergy include conjunctivitis, hand eczema, nasal congestion, a skin rash, and shortness of breath. Each in a sample of 46 hospital employees who were diagnosed with latex allergy based on a skin-prick test reported on their exposure to latex gloves (Current Allergy & Clinical Immunology, March, 2004).Summary statistics for a number of latex gloves used per week are = 19.3 and s = 11.9.    A) Form a 95% confidence interval for the average number of latex gloves used per week by all health care workers with a latex allergy. B) Form a 90% confidence interval for the average number of latex gloves used per week by all health care workers with a latex allergy. Please show step by step and formula used.
Angioplasty is a medical procedure in which an obstructed blood vessel is widened. In some cases, a wire mesh tube, called a stent, is placed in the vessel to help it remain open. A study was conducted to compare the effectiveness of a bare metal stent with one that has been coated with a drug designed to prevent reblocking of the vessel. A total of 5319 patients received bare metal stents, and of these, 848 needed treatment for reblocking within a year. A total of 1122 received drug-coated stents, and 142 of them required treatment within a year. Can you conclude that the proportion of patients who needed retreatment differs between those who received bare metal stents and those who received drug-coated stents? Let p1 denote the proportion of patients with bare metal stents who needed retreatment and p2 denote the proportion of patients with drug-coated stents who needed retreatment. Use the =α0.10 level of significance and the P -value method with the…
The financial manager of a national warehouse chain has found from previousexperience that 55% of clients pay by credit card, 30% pay on account, whilethe remainder pay using cash. He wishes to know if this is still the case. Arandom sample of 1000 sales receipts from the last month produced thefollowing results: Credit Card Account Cash Total Number of Reciepts 525 295 180 1000 Using a 5% significance level, test whether the payment method pattern haschanged.
Angioplasty is a medical procedure in which an obstructed blood vessel is widened. In some cases, a wire mesh tube, called a stent, is placed in the vessel to help it remain open. A study was conducted to compare the effectiveness of a bare metal stent with one that has been coated with a drug designed to prevent reblocking of the vessel. A total of 5324 patients received bare metal stents, and of these, 838 needed treatment for reblocking within a year. A total of 1125 received drug-coated stents, and 141 of them required treatment within a year. Can you conclude that the proportion of patients who needed retreatment differs between those who received bare metal stents and those who received drug-coated stents? Let p1 denote the proportion of patients with bare metal stents who needed retreatment and p2 denote the proportion of patients with drug-coated stents who needed retreatment. Use the =α0.01 level of significance and the P -value method with the…
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The Carnegie Classification of Institutes of Higher Education categorizes colleges and universities on the basis of their research and degree-granting activities. Universities that grant doctoral degrees are placed into one of three classifications: highest research activity, higher research activity, or moderate research activity. The Carnegie classifications for public and not-for-profit private doctoral degree–granting universities follow. Using a .05 level of significance, conduct a test of independence to determine whether Carnegie classification is independent of type of university for universities that grant doctoral degrees. What is the result for p-value?
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that578 employed persons and 492 unemployed persons are independently and randomly selected, and that261 of the employed persons and 194 of the unemployed persons have registered to vote. Can we conclude that the percentage of employed workers ( p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2 ), who have registered to vote? Use a significance level of α=0.1 for the test. Step 5 of 6 : Determine the decision rule for rejecting the null hypothesis H0H0. Round the numerical portion of your answer to two decimal places.

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