II52FormatToolsTablesWorkspaceWindowHelpReferencesMailingsReviewViewSectionToolsmeInsertPage LayoutA A日以,上,AaBbCcDd AaBb AaBbC AaBbCcl年NormalHead...Head...Head...New Styhow stressed over last month? quality of sleep CrosstabulationCountquality of sleeppoob AueryexcellentTotalJOodpoob100d Auan4.1113244.1.1.2.1.month?1.3.7.2.6.3.7.1.3.146.2.5.5.3.245.101.91-5.1.7.7.1.176.2.3.215.4.1.7.3.1.253.75extremely stressed2.11Total10068974. You are interested in further investigating whether there is a causal relationship between stressand sleep quality.a. 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-sectional(a) Case-Control(b) Cohort(c) Ecologic (d) RandomizedSelect one:Controlled Trialb. Provide a justification for your selections:c. Identify at least one potential confounding variable. Explain why it may be a confounderand how you might control for it.5. Answer the following questions regarding sampling method and its relationship to validity.d. What type of sampling method is convenience sampling?Type of sampling method:(a) Probability(b) Non-probabilitye.How would using a convenience sample affect the external validity of your study?f. How would using a convenience sample affect the internal validity of your study?17 Column: 81Words: 136区Spell CheckO Local backup onESFAND3.étv15文CA

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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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3) Imagine an experiment investigating whether there is a difference in people's weight loss after receiving either a six-week high- intensity cardio training vs. a six-week control program of low-interval yoga training. Which would be a good manipulation check O A. Asking participants whether they had extensive prior experience with sports nts O B. Measuring participants heart-rate during training O'C. Asking participants how they felt about their weight loss O D. Measuring participants' weight loss Reset Selection Previous Next Save MAR étv 18 20 II F8 F7 F9 F10 F11 F2 F3 F5 18 # $ % & delete 2 4 5 6 W E R T Y U O P %3D K
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What is the difference between an observational study and an experiment? Choose the correct answer below. OA. In an experiment, a treatment is applied to part of a population and responses are observed. In an observational study, a researcher measures characteristics of interest of a part of a population but does not change existing conditions. OB. In an experiment, a treatment is applied to an entire population and responses are observed. In an observational study, a researcher measures. characteristics of interest of an entire population but does not change existing conditions. OC. In an experiment, a researcher measures characteristics of interest of a part of a population but does not change existing conditions. In an observational study, a treatment is applied to part of a population and responses are observed. OD. In an experiment, a researcher measures characteristics of interest of an entire population but does not change existing conditions. In an observational study, a…
The hypothesis should revolve around one of the variables collected for all subjects. Your results section should describe the general course of one subject’s response from your individual analysis and then evaluate your hypothesis for a specific collective variable. Please explain this in plain english. I dont understand the instructions. Here is a reference of the subjects.
Omitting a variable from our model that has a causal effect on our dependent variable always leads to omitted variable bias. a. False b. True
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The director of student services at Oxnard College is interested in whether women are just as likely to attend orientation as men before they begin their coursework. A random sample of freshmen at Oxnard College were asked what their gender is and whether they attended orientation. The results of the survey are shown below: Data for Gender vs. Orientation Attendance Women Men Yes 440 410 No 238 239 What can be conduded at the a - 0.10 level of significance? For this study, we should use z-test for a population proportion a. The null and alternative hypotheses would be: Ho: Select an answer v Select an answer v Select an answer v (please enter a decimal and note that p1 and ul represent the proportion and mean women and and u2 represent proportion and mean for men.) H: Select an answer v Select an answer v Select an answer v (Please enter a decimal) b. The test statistic ? v (please show your answer to 3 decimal places.) c. The p-value = (Please show your answer to 4 decimal places.) d.…
. A researcher suspects that the actual prevalence of generalized anxiety among children and adolescents is higher than the previously reported prevalence of generalized anxiety disorder among children and adolescents. The previously reported prevalence of generalized anxiety disorder among children and adolescents is 4.1%, and the researcher conducts a study to test the accuracy of the previously reported prevalence of generalized anxiety disorder by recruiting 98 children and adolescents from various pediatricians’ offices and tests them for generalized anxiety disorder using the DSM-5. The researcher determines that the prevalence of generalized anxiety disorder among the participants of the study is 6.8%. The researcher’s hypothesis, for a level of significance of 5%, should resemble which of the following sets of hypothesis? A) H0: p > .041; H1: p = .041; alpha= .05 B) H0: p > .041; H1: p = .041; alpha= .95 C) H0: p = .041; H1: p > .041; alpha= .05 D) H0: p = .041; H1: p…
Discuss the basic epidemiology measures used in the Colorado uranium miners study. Specifically what measure of risk was used? How was risk calculated? (Hint: Consider a 2 by 2 table to display the data). Do you agree with the authors' conclusions? What would you infer from the data? Why?
You recently completed an experiment concerning the effects of carbs on happiness. One group of 11 people are assigned a high carb diet, another group of 11 people are assigned a moderate-high carb diet, another group of 11 people are assigned a moderate-low carb diet, and a final group of 11 people are assigned a low carb diet. If I find that I fail to reject the null hypothesis, what might my next step be? Group of answer choices Change my analysis and alpha to make the finding significant and then run post-hoc tests. 1. Run multiple dependent measures t-tests to see if there are any significant differences between particular groups 2. Run multiple independent samples t-tests to see if there are any significant differences between particular groups 3. Change my hypothesis to see if I can find something significant with a different hypothesis for this study 4. Run home and binge-watch Bridgerton because there is nothing else that should be done statistically
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57 268 4. You are interested in further investigating whether there is a causal relationship between stress and sleep quality. a. What type of study design will you choose? Select one: (a) Experimental (b) Quasi-experimental (c) Non- experimental