We want to design an experimental study toinfer whether moderate wine drinking causes alower risk of heart disease. To do this, we planto compare participants who drink a moderateamount of wine with participants who do notdrink wine.Part A: Which is the control group? Which is thetreatment group?O Non-wine drinkers are the control group,and moderate wine drinkers are thetreatment group.O Moderate wine drinkers are the controlgroup, and non-wine drinkers are thetreatment group.Part B: Would it make sense to allow the studyparticipants to choose which group they are in?YesO No Part C: As researchers, it is our job to createcontrol and treatment groups so thatconfounding variables, such as education andincome, do not interfere with the outcome.What should be our goal as we decide how toassign subjects to groups?To make sure that everyone in thecontrol group is similar to one anotherand that everyone in the treatment groupis similar to one anotherTo make sure that the composition of thecontrol group is similar to thecomposition of the treatment group

To design a study to infer whether moderate wine drinking causes a lower risk of heart disease, we…

Answered: We want to design an experimental study…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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You are designing a two-group true experiment examining the effects of pet ownership on a measure of happiness. You randomly sample 300 men and women and bring them into the laboratory to begin the study. You then use random assignment to conduct your experiment. A. Identify the independent variable and provide a description of how you will use experimental manipulation to create your two comparison groups (hint: remember this is a true experiment). B. Identify your dependent variable and provide an operational definition for how you will measure your that variable (without using a survey or a question asked of the participant)? C. After conducting your study, you find that your results are significant. How could you describe those results? State the conclusions (hint: remember this was a true experiment.)
1) Identify the type of observational study (cross-sectional, retrospective, or prospective) and explain the reason for your selection: A group of doctors studied New York City residents with and without respiratory problems. They went back in time to determine how involved they were in the New York City terrorist attacks on September 11, 2001 (Triola, 2013).
"Bullying," according to noted expert Dan Olweus, "poisons the educational environment and affects the learning of every child." Bullying and victimization are evident as early as preschool, with the problem peaking in middle school. Suppose you are interested in the emotional well-being of not only the victims but also bystanders, bullies, and those who bully but who are also victims (bully-victims). You decide to measure depression in a group of victims and a group of bully-victims using a 26-item, 3-point depression scale. Assume scores on the depression scale are normally distributed and that the variances of the depression scores are the same among victims and bully-victims. The group of 25 victims scored an average of 25.3 with a sample standard deviation of 9 on the depression scale. The group of 23 bully-victims scored an average of 20.5 with a sample standard deviation of 8 on the same scale. You do not have any presupposed assumptions about whether victims or bully-victims…
This question is from the below book, Chapter 15 (Comparing means of more than two groups) , AP 27 Book-Analysis of biological data 2nd Edition Michael C. Whitlock, Dolph Schluter Publisher: W. H. Freeman ISBN: 978193622148 Does adding math to a scientific paper make readers think that it has more value? Erikkson (2012) sent two abstracts of scientific papers to 200 people with postgraduate degrees. For each participant, one of the abstracts was randomly chosen and had a meaningless sentence inserted describing an unrelated. mathematics model, while the other had no mathematical addition. The sentence had no conceptual connection to the subject matter of the abstract; it was just meaningless mathematics in that context. Participants were asked to rate the quality of the research in each abstract on a scale from 1 to 100 and the differences between the scores of their two abstracts -score of the abstract with math minus score of abstract without math-were recorded. Participants were…
What type of statistical test did the researcher use to analyze her data? How many effects were tested in this test? Explain
O What is the independent variable in the study for a Within-Subject Design? What are the levels of that independent variable? What is the dependent variable?
Investigators are interested in the relationship between sleep apnea and Alzheimer's disease. In order to more thoroughly understand the relationship, these investigators decide to recruit 50 participants with Alzheimer's and 50 participants without Alzheimer's, and look at their history of sleep apnea. 1) What type of study design is this? Explain your answer in details. 2) What are the explanatory (independent or risk factor) and response (dependent, outcome or disease) variables? Explain your answer.
A research study examining differences in the effectiveness of three treatment conditions in combatting anxiety has three levels. True False
A clinical psychologist is interested in the effect of a new treatment for treating depression. She randomly divides her clients into two groups. One group receives the new treatment and the other group receives the old treatment (control group). At the end of treatment, she assesses the severity of their depression on a scale ranging from 0 to 20 (higher scores indicate greater depression). Was there a significant difference in depression scores between the two treatments? New Treatment Old Treatment 2 7 5 10 3 6 8 8 11 4 4 8 6 10 4 4
A scientist is studying the effect of a new type of exercise program on cardiovascular health. The scientist randomly assigns individuals to either the exercise program or a control group. The scientist wants to determine if the exercise program has a statistically significant effect on cardiovascular health. The scientist monitors cardiovascular health by measuring the blood pressure of each individual.
A researcher is testing the effect of one independent variable using three treatment conditions. She compares three group means where there are different people in each group. It is best for her to use which type of statistical analysis?
What is the distinguishing feature of a case-control study such as this? An epidemiologist performed a case-control study examining whether tobacco use was associated with oral cancer. The investigator recruited a random sample of 75 adults with oral cancer and 72 adults without oral cancer. Participants were interviewed and asked about their history of tobacco use. O Exposure status was assessed, and then the participants were followed up over time to see who developed the outcome. O The exposure and outcome were measured at the same time, so temporality cannot be established. O Participants were selected based on disease status, and then exposure status was assessed from the past. O The investigator randomized participants into exposure groups and then followed them to see who developed the outcome.

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