study is designed to investigate whether there is a difference in response to various treatments in patients with rheumatoid arthritis. The outcome is patient's self-reported effect of treatment. The data are shown on the next page. Is there a significant difference in effect of treatment? Hint: Are severity of symptoms and treatment independent? Run the test at a 5% level of significance. Demonstrate the five steps for hypothesis testing and draw a conclusion based on your results. Remember to determine the p- value, if relevant. No Effect Total Symptoms Worsened Symptoms Improved Treatment 1 22 14 14 50 Treatment 2 14 15 21 50 Treatment 3 12 29 50

study is designed to investigate whether there is a difference in response to various treatments in patients with rheumatoid arthritis. The outcome is patient's self-reported effect of treatment. The data are shown on the next page. Is there a significant difference in effect of treatment? Hint: Are severity of symptoms and treatment independent? Run the test at a 5% level of significance. Demonstrate the five steps for hypothesis testing and draw a conclusion based on your results. Remember to determine the p- value, if relevant. No Effect Total Symptoms Worsened Symptoms Improved Treatment 1 22 14 14 50 Treatment 2 14 15 21 50 Treatment 3 12 29 50

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Description: study is designed to investigate whether there is a difference in response to various treatments inpatients with rheumatoid arthritis. The outcome is patient's self-reported effect of treatment. The dataare shown on the next page. Is there a signifi

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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As part of an effort to induce the public to conserve energy, a researcher wanted to analyze the factors that determine home heating costs. In a city known for its long, cold winters the researcher took a random sample of 35 houses and collected data on the following variables: cost of heating during the month of January, house size in hundreds of square feet, number of windows, and number of occupants per house. A multiple regression model for the cost of heating was estimated with the Excel output shown below: SUMMARY OUTPUT Regression Statistics Multiple R R Square Adjusted R Square Standard Error Observations ANOVA Regression Residual Total Intercept Size Windows Occupants 0.554 0.511 34.898 35 Df 31 34 Coefficients 11.088 5.632 3.179 15.431 SS 46919 37754 84673 Standard Error 4.532 1.489 1.966 6.850 MS 15639.7 1217.9 t Stat 2.45 3.78 1.62 2.25 F 12.84 P-value 0.0202 0.0006 0.1154 0.0316 Significance F 0.000 a. Using a 5% significance level, determine if there exists a significant…
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You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly different from 0.23. You use a significance level of a = 0.10. Ho:p = 0.23 H₁:p 0.23 You obtain a sample of size n = 533 in which there are 103 successes. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value= The p-value is... O less than (or equal to) a O greater than a This test statistic leads to a decision to... O reject the null O accept the null O fail to reject the null As such, the final conclusion is that... O There is sufficient evidence to warrant rejection of the claim that the proportion of women over 40 who regularly have mammograms is different from 0.23. O There is not sufficient evidence to warrant rejection of the claim that the proportion of women over 40 who regularly have mammograms is different from…
Q: Using the data (provided below this question) test the hypotheses that the mean difference in writing and reading scores is zero and that the mean difference in math and science scores is zero. Use the paired-sample procedure. Use a 5% significance level if the problem doesn’t give an alpha. Note: Please only provide the t stat, p(T<=t) value and critical value. No need to explain the steps. School District Writing Reading Math Citizenship Science All Indian Hill 95 98 89 95 91 83 Wyoming 98 96 86 93 87 81 Mason City 96 92 85 94 86 72 Madiera 94 95 88 82 88 69 Mariemont 99 92 74 89 88 68 Sycamore 85 88 80 87 84 68 Forest Hills 93 91 73 85 88 67 Kings Local 92 86 78 82 78 64 Lakota 90 88 73 85 81 64 Loveland 85 93 72 86 86 61 Southwest 92 82 73 78 73 58 Fairf ield 90 86 71 83 77 57 Oak Hills 88 86 75 77 79 57 Three Rivers 87 85 66 84 77 56 Milford 82 86 72 82 76 53 Ross 84 85 66 75 78 52 West Clermont 88 83 63 73 70 48 Reading 88 80 58 76 75…
Floretta, a golfer, claims that her drive distance is not equal to 238 meters, on average. Several of her friends do not believe her, so she decides to do a hypothesis test, at a 5% significance level, to persuade them. She hits 19 drives, collects the proper data, and works through the testing procedure: • Hou = 238; HH #238 • a = 0.05 (significance level) The test statistic is X-Ho Zo == 256-238 14 V19 <= 5.6 • The critical values are -20.025 = -1.96 and 20.025 = 1.96. Conclude whether to reject or not reject Ho. and interpret the results. Select the correct answer below: Reject Ho. At the 5% significance level, the test results are not statistically significant and at best, provide weak evidence against the null hypothesis. Reject Ho. At the 5% significance level, the data provide sufficient evidence to conclude that the mean distance is not equal to 238 meters. Do not reject Ho. At the 5% significance level, the test results are not statistically significant and at best, provide…
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Historically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A recent Gallup Poll of 2500 people showed 1723 in favor of stricter gun control laws . Assume the poll was given to a random sample of people. QUESTION Test the claim that the proportion of those favoring stricter gun control has changed from 0.55. Perform a hypothesis test, using a significance level of 0.01. What kind of test will you need to perform? A right, one-tailed z-test A left, one-tailed z-test A two-tailed z- test
Answer this question, Please answer full parts to the question. Show all work and be neat. Show all conditions, and p-value, conclusion, anything under the 4 step statistical process. Thank you!
The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
During the 1990s, the fatality rate for lung cancer was 80 per 100,000 people. After the turn of the century and the establishment of newer treatments and adjustment in public health advertising, a random sample of 10,000 people exhibits only six deaths due to lung cancer. Test at the 0.05 significance level whether that data are proof of a reduced fatality rate for lung cancer. b. Make the decision rule. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) c. Evaluate the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.)
Psychology experiments sometimes involve testing the ability of rats to navigate a maze. One researcher needs a maze that will take rats, on average, less than a minute to solve. The data below (image provided) gives the completion times for this maze for 20 randomly sampled rats. Will the maze fulfill the researcher’s time requirement? Use a significance level of ? = 0.05. What are the hypotheses. What are the test statistic and p-value. What is the full conclusion for this test in the context of the problem.