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Qualtrics Survey SoftwareBefore 11pm11pm-12am12-1am1-2amLater than 2amYesNoDefault Question BlockPlease enter a 4 digit number that you will remember in a few weeksHow many hours of sleep per night, on average, have you gotten OVER THE LAST WEEK?What time have you typically gone to bed IN THE LAST WEEK?Do you have a significant other?Do you have a job?Qualtrics Survey Software https:tcnj.co1.qualtrics.com/Q/EditSection/Blocks/Ajax/GetSurveyPrin...1 of 4 9/29/2020, 11:26 AMYesNoNot at allSomeVery muchHow much time a day on average have you spent on social media (in minutes) IN THE LAST WEEK? How nervous are you right now about this course?How stressed have you been IN THE LAST WEEK, on a scale from 0 (the least stressed I’ve ever been)to 100 (the most stressed I’ve ever been)?SWLBelow are five statements that you may agree or disagree with. Using the 1 - 7 scale,indicate your agreement with each item. Please be open and honest in your responding.Stronglyagree AgreeSomewhatagreeNeitheagree nodisagreeSomewhatdisagree DisagreeStronglydisagreeIn most ways my life isclose to my ideal.The conditions of my lifeare excellent.I am satisfied with mylife.So far I have gotten theimportant things I wantin life.Qualtrics Survey Software https:tcnj.co1.qualtrics.com/Q/EditSection/Blocks/Ajax/GetSurveyPrin...2 of 4 9/29/2020, 11:26 AMStronglyagree AgreeSomewhatagreeNeitheagree nodisagreeSomewhatdisagree DisagreeStronglydisagreeIf I could live my lifeover, I would changealmost nothing.ACSPSSThe questions in this scale ask you about your feelings and thoughts during the 2weeks. In each case, you will be asked to indicate by selecting how often you felt othought a certain way.In the LAST WEEK, how often have you...Never Almost Never Sometimes Fairly Often Very Oftenfelt difficulties were pilingup so high that you couldnot overcome them?een upset because ofsomething that happenedunexpectedly?found that you could notcope with all the thingsyou had to do?felt confident about youability to handle youpersonal problems?een angered becauseof things that wereoutside of your control?Never Almost Never Sometimes Fairly Often Very Oftenfelt that you were unableto control the importantthings in your life?felt that you were on topof things?een able to controliitations in your life?felt that things weregoing your way?felt nervous and"stressed"?Qualtrics Survey Software https:tcnj.co1.qualtrics.com/Q/EditSection/Blocks/Ajax/GetSurveyPrin...3 of 4 9/29/2020, 11:26 AMQualtrics Survey Software https:tcnj.co1.qualtrics.com/Q/EditSection/Blocks/Ajax/GetSurveyPrin...4 of 4 9/29/2020, 11:26 AM Spilich, June, and Renner XXXXXXXXXXinvestigated the effects of smoking on performancePsychology 203, Fall 2020Lab Project 340 pointsDue: by class time on Nov. 5 (via Canvas)Use the data set “class questionnaire.three timepoints.203.F20” to answer the following questions about students who completed the “initial class questionnaire.203.f20,” the “second class questionnaire.203.F20,” and the “third class questionnaire.203.F20” (posted on Canvas).  In addition to answering the questions below, please also save and attach your syntax (1 point). Note about syntax: please attach a “clean” copy that includes only the analyses you report on here – not analyses you did that you don’t report or any duplicate analyses.  Also, please copy and paste your syntax to the bottom of this document, rather than sending a separate syntax document.  1. Using our class data, propose and test an interesting research question that can be answered using a one-factor between-subjects ANOVA.a. State the research question and why it is appropriate for this test. Also clearly identify your variable and its scale of measurement. 3 points . Why would you rather answer this question with an ANOVA F-test than several t-tests? 1 pointc. Do a formal write up (step 6, including all relevant effect sizes).  Also paste in the output tables that you used to obtain any numbers in your formal write-up. 3 pointsd. Is it appropriate to conduct such a statistical test (in other words, are the assumptions met)?  Explain why or why not (and you can paste in SPSS output that supports your explanation).  2 points e. What eor could you be making? Taking everything into consideration, do you think you’ve made that eor? Explain why or why not. 3 points2. Using our class data, propose and test an interesting research question that can be answered using a one-factor WITHIN-subjects ANOVA.a. State the research question and why it is appropriate for this test. Also clearly identify your variable and its scale of measurement. 3 points . Using your textbook, please find the critical values for this test. 1 pointc. Do a formal write up (step 6, including all relevant effect sizes).  Also paste in the output tables that you used to obtain any numbers in your formal write-up. 3 pointsd. Is it appropriate to conduct such a statistical test (in other words, are the assumptions met)?  Explain why or why not (and you can paste in SPSS output that supports your explanation).  2 points e. What eor could you be making? Taking everything into consideration, do you think you’ve made that eor? Explain why or why not. 3 points3. Using our class data, propose and test an interesting research question that can be answered using a TWO-factor between-subjects ANOVA. NOTE: Your DV MUST be a total score of one of the 3 questionnaires on the initial questionnaire.a. State the research question and why it is appropriate for this test. Also clearly identify your variable and its scale of measurement. 3 points . Specifically, explain what an interaction would tell you about the variables (in other words, define an interaction in terms of these variables). 1 pointc. Do a formal write up (step 6, including all relevant effect sizes).  Also paste in the output tables that you used to obtain any numbers in your formal write-up. 3 pointsd. Is it appropriate to conduct such a statistical test (in other words, are the assumptions met)?  Explain why or why not (and you can paste in SPSS output that supports your explanation).  2 points e. What eor could you be making? Taking everything into consideration, do you think you’ve made that eor? Explain why or why not. 3 points4. In a iefly paragraph, describe what these 3 analyses have told you about our class (I’m not asking for a formal APA write-up here).  How do you interpret your findings?  Are they surprising to you – why or why not? 3 points

Suraj · Accepted Answer

1.
One factor between-subjects ANOVA:
(a) Research question: The question is that we are interested in testing that whether there is a significant difference between the sleep time of the students on their year. This is appropriate to test that we want to know is there any effect on the sleep time by increasing the number of the year. The variables are year which has four levels from 0 to 4 and sleep1 variable. The scale of the measurement of year variable is scale and for sleep1 is nominal. 
(b) The t-test are not possible in this case because t-test gives good results only in that case where we have only two variables. But here we have 4 levels of year. Thus, there are 4 variables to test. Hence, the right approach to do a good analysis is the one-way ANOVA test.
(c) The one-way ANOVA test is conducted using the SPSS software. 
The hypotheses for this test are given as follows:
H0: There is no significant difference between number of year and the sleep time.
H1: There is a significant difference between number of year and the sleep time.
The output for the one-way ANOVA is given as follows:
From the output, the p-value for between the groups is 0.039. The level of significance is 0.05. Thus, the p-value is less than the level of significance. Hence, the null hypothesis is rejected. Hence, we conclude that there is a significant difference between number of year and the sleep time. 
(d) The assumptions for ANOVA test are given as follows:
i. The data should be normally distributed.
ii. The variance is homogenous for data that is homogeneity of variance condition is met.
       
To check the assumptions, the tests are conducted using the SPSS and the output is given as follows:
From the test for homogeneity of variances the p-value is 0.02 for most of the tests. Hence, the assumption is not met for the data. Also, for the normality test the p-value is 0. Which is also less then the level of significance. Hence, the normality assumption is also not met for the data.
(e) Yes, two errors are made during the analysis. One is the violation of the homogeneity of variance assumption and second and the most important assumption violation of normality of the data. 
2.
One factor within-subjects ANOVA:
(a) Research question:

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