6.38 Parasitic worm. Lymphatic filariasis is a disease caused by a parasitic worm. Complications of thedisease can lead to extreme swelling and other complications. Here we consider results from a randomizedexperiment that compared three different drug treatment options to clear people of the this parasite, whichpeople are working to eliminate entirely. The results for the second year of the study are given below:46Clear at Year 2Not Clear at Year 2Three drugsTwo drugsTwo drugs annually52231244214(a) Set up hypotheses for evaluating whether there is any difference in the performance of the treatments,and also check conditions.(b) Statistical software was used to run a chi-square test, which output:x2 = 23.7df = 2p-value = 7.2e-6Use these results to evaluate the hypotheses from part (a), and provide a conclusion in the context ofthe problem.

Chi square test is a nonparametric test.

Answered: 6.38 Parasitic worm. Lymphatic…

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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13. A study is designed to evaluate the impact of a daily multivitamin on students' academic performance. One hundred sixty students are randomly assigned to receive either the multivitamin or a placebo and are instructed to take the assigned drug daily for 20 days. On day 20, each student takes a standardized exam and the mean exam scores are compared between groups. This study is an example of a: a randomized controlled trial b. case-control study cohort study d. crossover trial C.
When neither the subject nor those having contact with the subject know the treatment assignment, the study is called unbiased. double-blind. blind. statistically significant. randomized.
Q1. Please answer fill-ins.
Acne is a common skin disease that affects most adolescents and can continue into adulthood. A study compared the effectiveness of three acne treatments and a placebo, all in gel form, applied twice daily for 12 weeks. The study's 517 teenage volunteers were randomly assigned to one of the four treatments. Success was assessed as clear or almost clear skin at the end of the 12 week period. The results of the study can be seen in the table below. Using the appropriate statistical test, determine if there is significant evidence that the four treatments perform differently. If so, how do they compare.
A researcher wants to test the effectiveness of a new drug to treat asthma. One hundred patients with chronic, stable asthma were randomly assigned to one of three groups to receive a placebo (0mg), 1mg of drug, or 5 mg of drug. After treatment, a doctor tested the patient’s forced expiratory volume for 1 second (FEV1). Which statistical test would be best to determine if there is a significant difference between groups? one-sample t-test dependent samples t-test independent samples t-test ANOVA
Popular Diets. In the article “Comparison of the Atkins, Ornish, Weight Watchers, and Zone Diets for Weight Loss and Heart Disease Risk Reduction” (Journal of the American Medical Association, Vol. 293, No. 1, pp. 43–53), M. Dansinger et al. conducted a randomized trial to assess the effectiveness of four popular diets for weight loss. Overweight adults with average body mass index of 35 and ages 22–72 years participated in the randomized trial for 1 year. The weight losses, in kilograms, based on the results of the experiment are given on the WeissStats site. Negative losses are gains. WW = Weight Watchers. a. Obtain individual normal probability plots and the standard deviations of the samples. b. Perform a residual analysis. c. Use your results from parts (a) and (b) to decide whether conducting a one-way ANOVA test on the data is reasonable. If so, also do parts (d) and (e). d. Use a one-way ANOVA test to decide, at the 5% significance level, whether the data provide sufficient…
The effect of the time of day a psychology class is taught on test scores is being studied in an experiment. Student ability has been identified as an extraneous factor that could also affect test scores. How can student ability best be addressed to minimize its effect in the experiment? O A. Direct control of what textbook is used B. Randomization of students in morning and afternoon classes O C. Replication of the experiment at different times of the year D. Blocking into groups based on the teacher of the class
5. Use the data set 1. This is the result of a randomized trial in Uganda where 10 students in the same village were selected and given a solar-powered reading lamp. The second group was not given any lamp. The number of students out of 10 who improved their school grades for both groups were recorded. The experiment was repeated in 50 villages. Test the hypothesis that solar-powered reading lamps are effective in improving school grades in Uganda.
The caluations for a factorial experiment involving four levels of factor A, three levels of factor B, and three replications resulting in the following data: SST = 276, SSA=23, SSB = 25, SSAB =170. Set up the ANOVA table and test for significance using a=0.5. Show entries to 2 decimals, if necessary. If the answer is zeeo enter 0. Factor A? Factor B? Interaction? Error? Total? Thank you
(OPHTHALMOLOGY) The following data are from a study on Botox injections. Patients received a high-dose injection in one eye (experimental treatment = treatment E) and a low-dose injection in the other eye (control treatment = treatment C). Patients were asked to rate the level of pain in each eye on a 1–10 scale, with higher scores indicating more pain. The assignment of treatments to eyes was randomized. The subjects came back over several visits. Data from the last visit are given in the following table: 1. Which of the following is the correct test to conduct given the situation above? 2. The hypotheses are: 3. What is the level of significance? 4. What is the computed test statistic? Hint: Use (mean of "Pain in E eye") minus (mean of "Pain in C eye") 5. What is the correct decision based on the p-value or critical value method?
State the hypotheses for each of the three separate tests included in the two-factor ANOVA.
6. A clinical trial is conducted comparing a new pain reliever for arthritis to a placebo. Participants are randomly assigned to receive the new treatment or a placebo and the outcome is pain relief within 30 minutes. The data are shown in Table 7–54. Is there a significant difference in the proportions of patients reporting pain relief? Run the test at a 5% level of significance.

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