An investigation is performed to evaluate two newexperimental treatments for allergies. 18 subjectswho suffer from allergies are enrolled in the study andrandomly assigned to one of three treatments:Control Group, Experimental Treatment 1, orExperimental Treatment 2. Each subject is instructedto take the assigned treatment, and symptoms ofallergies are recorded on a scale of 1 to 20, with higherscores indicating worse symptoms.The data is summarized in the table below:SBPStd.DeviationGroupMeanControl Treatment6.16.172.483Experimental Treatment16.11.331.966Experimental Treatment6.3.831.472Total1810.445.554Use this data to complete an ANOVA table to test for asignificant difference in the means of each of thegroups. Round all answers to the third decimal point. In Question 3 above, we reject the null hypothesisbecause the F statistic is greater than the F criticalvalue.Use the LSD multiple comparison test and indicatewhich groups have significantly different means.Experimental Treatment 1 and ExperimentalTreatment 2 have different means.None of these choices are correct.Control Treatment and ExperimentalTreatment 2 have different means.Control Treatment and ExperimentalTreatment 1 have different means.

Formula: The two groups are said to be significant if x¯i-x¯j>tn-k,αMSE1si+1sj Here, n represents…

Answered: An investigation is performed to…

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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Migraine and Acupuncture: A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomized controlled study where 164 patients diagnosed with migraine headaches were randomly assigned to one of two groups: treatment or control. 70 patients in the treatment group received acupuncture that is specifically designed to treat migraines. 94 patients in the control group received placebo acupuncture (needle insertion at non-acupoint locations). 24 hours after patients received acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below. Test to see if migraine pain relief is dependent on receiving acupuncture. Use a = 0.05. Pain Free: Yes Pain Free: No Total Treatment Control Total 19 51 70 9 85 94 28 136 164 a) What is the correct null hypothesis? O Ho: P1 P2 P3 = P4 O Ho: Migraine pain relief is dependent on…
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Researchers investigate how the presence of cell phones influence the quality of human interaction. Subjects are randomly selected from a population and divided into an experimental group that is asked to leave their phones in the front of the room and a control group that are not asked to leave their cell phones at the front of the room. Subjects are left alone for 10 minutes and then asked to take a survey designed to measure quality of interactions they had with others in the experiment. What statistical test is appropriate?
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Vitamin E and the Risk of Prostate Cancer: Klien et al (2011) conducted the following study to determine the effect of vitamin E and selenium treatment on the risk of developing prostate cancer in healthy men. A total of 34,887 men from different study sites in the United States, Canada, and Puerto Rico were randomly selected. To be eligible to participate, the men had to take a rectal examination that showed he was not suspicious of having prostate cancer and be aged 50 years or older for black men and 55 years or older for all others. Each man was randomly assigned to receive one of four treatments: selenium, vitamin E, selenium and vitamin E together, or a placebo. The men were followed up after 8 years to see if they had developed prostate cancer or not. The main question of interest is to determine if the risk of developing prostate cancer differs by the treatment taken. The data are summarized in the table below: No Prostate Cancer Prostate Cancer Total Selenium 8,752 8,737 8,702…
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Migraine and Acupuncture: A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomized controlled study where patients diagnosed with migraine headaches were randomly assigned to one of two groups: treatment or control.Patients in the treatment group received acupuncture that is specifically designed to treat migraines and patients in the control group received placebo acupuncture (needle insertion at non-acupoint locations). 24 hours after patients received acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below. Test to see if migraine pain relief is dependent on receiving acupuncture. Test at the 8% level and round expected values to one decimal place. Pain Relief Yes (Observed) Yes (Expected Value) No (Observed) No (Expected Value) Row Total No Relief 29 29 58 Control 91 103…

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An investigation is performed to evaluate two new experimental treatments for allergies. 18 subjects who suffer from allergies are enrolled in the study a randomly assigned to one of three treatments: Control Group, Experimental Treatment 1, or