Question

Psy 248: STATISTICS- MARIA MIRANDA Computer Lab Assignment II, SP 2019 Comparing means using t-tests This assignment will give you practice choosing the appropriate test statistic to use for different research designs that all involve comparing using t-tests. You will need to enter the data, use SPSS to test hypothesis, and write a conclusion for each problem stating weather or not the samples differed significantly. To run all 3 tests, use: ANALYZE, COMPARE MEANS, and then select the type of test and the variables. Problem 1: Hopefulness after Hurricane Maria Suppose you are studying the psychological effects of Hurricane Michael on the residents of Panhandle region of Florida. Specifically, you are interested in whether people felt more or less hopeful after the hurricane. You randomly select 10 people from Mexico Beach to complete a short questionnaire. The key item on the questionnaire was: how hopeful do you feel? The researchers used a 7-point Likert-type scale: from extremely unhopeful (1) to neutral (4) to extremely hopeful (7). You want to know whether the responses would be consistently above or below the midpoint of the scale (4). Scores for sample: 4,3,6,2,4,6,7,4,2,1 Independent variable: Dependent Variable: State Mathematical Hypothesis: но: Hi: Hypothesis in words. HO: HI: What is the proper t-test? One-tailed or two tailed? Perform the proper t-test using SPSS. Reports the results of the statistical test and what it means in this study using APA-style. Problem 2: Oxygen consumption and music The am periods, while they were sitting with their eyes closed. During one period, they listened to an ount of oxygen consumption was measured in six individuals, over two 10-minute exciting adventure story, during the other, they heard restful music. Participant Story Mu 4.10 6.72 5,00 5.70 6.40 5.82 .16 5.96 6,08 6.56 5.90 6.95 4.40 6.44 7.78 5.66 6.00 10 6.10 Based on the results obtained, is oxygen consumption less when listened to the music? Test Hypothesis at 0.05 significance level. Hypothesis: HO HI Degrees of freedom(df): Critical Value: Ss_ Report findings (Use APA style) Problem 3: Expressive Writing and physical health A team of researchers is interested in the effect on phoysical health of writing feelings associated with traumatic life events (expressive writing) undergraduate students to take part in the study and randomly as writing group or a control group. Students in the expressive wTitig four 20 minute essays over consecutive days describing their The researchers reeruit 30 randomly assign them to be in an expressive week later instruet plans for that day. One I health ( on a scale O-very poor health to 100- perfect health). EWG: 75,86,77,91,68,74,62.93,82,79,94,56,79,86,90 CWG: 8 1,76,71·70,62.50,586376-646572,525960 r overall l The searchers were interested in identifying the positive or negative writing. Run the proper t-test to see if this previous health effect of expressive research is supported. Independent variable: Dependent variable: Statistical Hypothesis HO: Hi State Hypothesis in words HO: HI Proper t-test: One tailed or two tailed? Run the analysis usins SPSS and "print" the t-test output. Include a boxplot of both groups in your wtte-up. Using SPSS style. Report your conclusions in the words (using the variables) of this study based on the research hypothesis and the statistical results.

Answer 1

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