39. You are interested in further investigating whether there is a causal relationship between stress and sleepquality.а.What type of study design will you choose?Select one:(a) Experimental(b) Quasi-experimental(c) Non-experimentalSelect one:(a) Retrospective(b) Prospective(c) Cross-sectionalSelect one:(a) Case-Control(b) Cohort(c) Ecologic(d) Randomized Controlled Trialb. Provide a justification foryourselections:c. Identify at least one potential confounding variable. Explain why it may be a confounder and how youmight control for it.40. Answer the following questions regarding sampling method and its relationship to validity.а.What type of sampling method is convenience sampling?Type of sampling method:(a) Probability(b) Non-probabilityb. How would using a convenience sample affect the external validity of your study?c. How would using a convenience sample affect the internal validity of your study?С.

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Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015

1st Edition

ISBN:9781680331141

Author:HOUGHTON MIFFLIN HARCOURT

Publisher:HOUGHTON MIFFLIN HARCOURT

Chapter4: Writing Linear Equations

Section: Chapter Questions

Problem 14CR

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What is meant by the sample space of an experiment?
A researcher collects data from a sample of children with Crohn's disease and then compares that data to data collected from a sample of children without the disease. What type of study design is the researcher using for this study? Cohort Cross-sectional Quasi-experimental Case-Control
Statistics Question
a. Randomized Clinical Trial (sometimes also called a Randomized Controlled Study) b. Case Control Study c. Cohort Study d. Longitudinal Study
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).
2. (Table: TV and Aggressiveness) In a fictional study, a pretest-posttest design was used to examine the influence of a television program on children's aggressiveness. The number of aggressive responses was measured during an observation period both before and after the television program. Calculate the appropriate test statistic to hypothesis test whether or not there is a difference in the number of aggressive behaviors in children after having viewed the television program. Use a = .05 and calculate the test statistic as a two tailed test. Table: TV and Aggressiveness Participant 1 2 3 4 5 6 7 Before 6 4 12 9 10 2 14 After 9 3 11 12 14 6 12
A recent study compared patients who developed a central venous catheter infection. the investigators then reviewed the medical history of each patient to determine possible risk factors for a central venous catheter infection. Which of the following best describes this study design? a. case series b. case-control study c. cohort study d. randomized controlled trial e. systemic review
1) Soda consumption is very common in the U.S. For the purposes of this question, assume that 30% of the population consumes the equivalent of 3 or more 12 oz. sodas per week (this is the prevalence of the exposure). A large multi-center cohort study was conducted to evaluate the association between soda consumption and risk of diabetes. At baseline, participants were asked about their typical soda consumption, and individuals who reported consuming 3 or more sodas per week were considered exposed. Participants were followed for 10 years, and the following results were obtained: Incident Cases of Diabetes 356 236 Person-Years Contributed 3+ sodas a week 375234 <3 sodas a week 399763 a) Name the appropriate measure of association corresponding to the excess rate of diabetes attributable to soda consumption among subjects who consume 3+ sodas per week. Calculate this measure (shown as a rate, using the correct units), and provide a brief interpretation of your answer b) Calculate the…
1) Soda consumption is very common in the U.S. For the purposes of this question, assume that 30% of the population consumes the equivalent of 3 or more 12 oz. sodas per week (this is the prevalence of the exposure). A large multi-center cohort study was conducted to evaluate the association between soda consumption and risk of diabetes. At baseline, participants were asked about their typical soda consumption, and individuals who reported consuming 3 or more sodas per week were considered exposed. Participants were followed for 10 years, and the following results were obtained: Incident Cases of Diabetes 356 236 Person-Years Contributed <3 sodas/wk: 3+ sodas a week <3 sodas a week a) Was this a prospective study or a retrospective study, and was it a general cohort or a specific exposure cohort? 375234 399763 b) Name the appropriate measure of disease (morbidity) frequency and calculate this measure for each group 3+ sodas/wk: c) Name the appropriate relative measure of association…
Classify the cases/scenario as regards to the appropriate design/analysis for the experiments: A woman learned from a friend that rubbing the leaves with either egg white or coconut oil could enhance the appearance of indoor plants. But she was doubtful that this will induce withering of the leaves. She then plans to conduct an experiment to compare the effects of these two. For better comparison, she would like to include a control (no egg whole nor coconut oil) and the outcome data follows a non-normal distribution. * (Parametric/Nonparametric – Design/Analysis e.g. Par-ANOVA(RCBD), Nonpar-Wilcoxon test) Your answer
Assuming you are in a member of a research team convened to study rare blood disorder in the adult population in New York. Which of these study designs will you consider as the most appropriate? cross-sectional case-control experimental cohort
Explain the Potential Outcomes and the Average Causal Effect of using randomized controlled experiments?

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