MTH2003 SP 20234. If you are a dog lover, perhaps having your dog along reduces the effect of stress. To examine theeffect of pets in stressful situations, researchers recruited 48 women who said they were dog lovers.Sixteen of the subjects were randomly assigned to each of three groups to do a stressful task-alone(the control group C), with a good friend present (F), or with their dog present (P). The subject'saverage heart rate during the task is one measure of the effect of stress. The following is the outputBased on the screenshot of analysis, please record the informationfrom ANOVA run on crunch-it. .listed below in your answer, and then draw your conclusion. Be sure to decide if this was appropriateto run in the first place. Write a one or two sentence summary in non-statistical language to describewhat you have found, not how you found it. Your audience is people who have never had a statisticsclass (think of middle of the road 8th graders, not the really bright ones).ANOVA output:Results - One-Way ANOVAExport-Statistics:فی جاتPCFSource Sum of Squares df Mean Square F-value P-valueGroup 1462731.23.614 0.03504Error 9105202.3Total 1.057e+4Results - Descriptive StatisticsExport-Group nSample Mean Standard Deviation16 75.0816 84.6916 88.1211.5515.6215.15Ho: Me=M]H₁₂ M₁ = M₁₂₁₂ = M₂₁₂ = π ₁H₂T47Mcdegrees of freedom = 16-1 = 1grariation among Sample meansvariation among independent Same SampleP=0.35042 P<0.6367Xleast one is different)differentyno-43,614& twoI-1-1N-1-3Conclusion- 5

Null Hypothesis (H0): There is no statistically significant difference in the average heart rate…

Answered: 4. If you are a dog lover, perhaps…

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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The following table represents the results of the study which compares effects of regular coffee vs decaffeinated coffee. The outcome is a development of headache. Regular coffee Headaches 17 Decaffeinated coffee 9 Total 26 No headaches 51 55 106 Which of the values best represents the risk difference(RD) in this study?
A researcher gathered a sample of participants who volunteered for a studying of phobias. She measured anxiety level of participants as they viewed photos of spiders and again when they viewed puppies. Which statistical test is appropriate for this study and why?
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?
A researcher is interested in investigating the relationship between sugar consumption and weight gain for high school students. 15 volunteers were randomly assigned to one of two groups. The first group contained 6 volunteers who were put on a low sugar diet. The second group consisting of the remaining 9 volunteers was put on a diet with sugar constituting approximately 15% of their diet. After 8 weeks, the change in weight was recorded for each of the volunteers. Question: What is the response variable? What study principle was used in this study and what kind of study is this?
A food-frequency questionnaire is used to measure dietary intake. The respondent specifies the number of servings of various food items they consumed over the previous week. The dietary cholesterol is then quantified for each respondent. The researchers were interested in assessing if there was an association between dietary cholesterol intake and high blood pressure. In a large sample of individuals who had completed the questionnaire, 250 persons with a high dietary cholesterol intake (greater than 300 mg /day) were selected and 250 persons with a low dietary cholesterol intake (less than 300 mg/day) were selected. The 500 selected participants had their medical history taken and were classified as having normal or high blood pressure. The data are given here. Dietary Cholesterol Blood Pressure Total High Low High 159 91 250 Low 78 172 250 Total 237 263 500 Test 2: two-tailed test for comparing two independent proportions Clearly state…
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You are interested in investigating the efficacy of a new pain medication and design an experiment measuring pain levels before and after the administration of a new medication. You recruit 9 people to participate in your study and bring the same 9 participants in for two separate sessions. Here is the raw data: Pair Number Placebo Pain Score Pain Medication Pain Score 1 2 4 5 6 7 8 9 5 7 10 5 8 7 8 6 8 QUESTION 20 5 5 8 4 4 3 5 3 2 Use the t-test handout printout provided to calculate the t- statistic. What is the t-test statistic value? Round to the nearest tenth. What conclusion would you make on the above data, based on the t-value you calculated and the critical value of t? O You accept the null hypothesis because the t-value you calculated is inside the bounds of the critical t-value O You reject the null hypothesis because the t-value you calculated is inside the bounds of the critical t-value O You reject the null hypothesis because the t-value you calculated is outside the…
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In a clinical trial of 2022 subjects treated with a certain drug, 21 reported headaches. In a control group of 1745 subjects given a placebo, 24 reported headaches. Denoting the proportion of headaches in the treatment group by p, and denoting the proportion of headaches in the control (placebo) group by pe, the relative risk is p/pe. The relative risk is a measure of the strength of the effect of the drug treatment. Another such measure is the odds ratio, which is the ratio of the odds in favor of a headache for the treatment group to the odds in favor of a headache for the control (placebo) group, found by evaluating Pt/(1-Pt) The relative risk and odds ratios are commonly used in medicine and epidemiological studies. Find the relative risk and odds ratio for the Pc/(1-Pc) headache data. What do the results suggest about the risk of a headache from the drug treatment? Find the relative risk for the headache data. The relative risk = (Round to three decimal places as needed.)

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