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
The data below are stress-test scores from 6 nurses from the Emergency Care (EC) unit and 6 nurses from the Long Term (LT) care unit who were randomly selected for the study. The investigator wants to test, at the 5% level, whether there is a difference in stress test scores in the EC group and the LT group. EC LT 5 2 9 3 8 5 10 6 7 4 6 2 State the hypotheses. What statistical test should be used to determine if there is a difference in stress scores between EC and LT nurses? Determine the appropriate critical value and set up the decision rule. Compute the test statistic. Interpret your results. Give your conclusion.
Steps 1,2, and three
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…
4. Identify the independent/subject variable and dependent/outcome variables for each of these types of research studies. Provide one operational definition for each. There can be more than one correct answer for the operational definitions, so write whichever one(s) you think make sense. a. A clinical psychologist wants to know whether a history of early childhood abuse is related to later vulnerability to depression. Independent/Subject Variable: Operational definition for Independent/Subject variable: Dependent/Outcome Variable: Operational definition for Dependent/Outcome variable: b. An educational psychologist is studying the effectiveness of a special program for teen parents. The program provides education and support related to parenting skills and career goals. He wants to know whether participants’ school performance will improve. Independent/Subject Variable: Operational definition for Independent/Subject variable: Dependent Variables: Operational definition for…
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.
Mr. Smith continues on his project of gaining insights on the 2020 BIOLOGY class and now that the first test has been written he can get initial findings. Something of interest that he would like to explore is the relationship between marks obtained and the time taken to complete the Test 1. In particular, he wants to answer: what influence does marks obtained have on the amount of time taken to finish the Test 1 . The table below shows a randomly selected sample of results for 12 students: Marks (%) Time (mins) 57 33 67 29 83 26 100 21 23 43 40 43 43 21 47 38 33 44 60 36 57 30 53 40 Use this data to answer the following questions: a. (1) time is the dependent variable or (2) Marks is the dependent variable b. Calculate c. Determine the least squares estimator for i.e, Answer d. (1) Based on the value for , the independent variable does not have an influence on the dependent variable. (2) Based on the value for , an increase of the…
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 depression study reports the following findings. There were no significant differences on depression symptoms across ethnic groups (Asian, latino, caucasian, African american ) or across treatment location.(home vs. clinic). Which of the following statements about the design is TRUE. 1. This would be considered a 2×2 ANOVA 2. There are 4 independent variables included here. 3. The ethnicity variable has 4 level and the treatment location variable has 2 levels. 4.There's a total of 4 separate group in this study.

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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