PSYC 3000 - Statistics Independent Samples t-test Worksheet Complete this worksheet. You will need these answers for Individual Assignment #7 1. Dr. Wolfe is a professor who teaches a class on statistics. She predicts that students who learn to calculate statistics by hand are better able to select the appropriate statistical test to use then students who learn to calculate statistics only using SPSS. She recruits two groups of students, and after teaching students using these two methods, she obtains quiz scores for each group. . Group 1 is the hand calculation group. There are 5 students in the group. The average quiz score is 8.29 ($5 = .9) Group 2 is the SPSS only group. There are 5 students in the group. The average quiz score is 6.4 (SS = 4.9) Dr. Wolfe wants to know if her prediction is correct - are Group 1 (hand calculation group) scores statistically significantly higher than Group 2 (SPSS only group) a. Calculate the t-statistic (rounded to the nearest 2 decimal places) for this test. The PowerPoint in the module will help you walk through the necessary calculations: b. What is the t-value for this study? Use the t chart to find it. soonmoo ard a just soil to exigsb banos oth sing to c. Is Dr. Wolfe's hypothesis supported? Is Group l's scores statistically significantly higher than Croup 2 - yes or no. 2. SPSS Interpretation: Use the study blurb below and the image of the SPSS output to answer the following questions: You are a researcher interested in the effects of videos on stress. You recruit participants who identify two groups. as "gamers" and are familiar with the Nintendo Switch controls. You randomly assign them to one of stress test. Group 1 plays Animal Crossing: New Horizons for 30 minutes. After playing, they then take a same stress test. Group 2 plays Wolfenstein II: The New Colossus for 30 minutes. After playing, they take thePSYC 3000 - Statistics Independent Samples t-test Worksheet You want to know if there is a statistically significantly difference in the stress scores between the groups. You plug your data into SPSS and run the independent t-test. Here are the results: Group Statistics Groups Mean Std. Deviation Std. Error Mean stress 3.48 2.086 322 6.45 3.263 503 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means Sig. (2- Mean Std. Error Difference Difference Stress Equal variances assumed 11.996 .001 -4.981 82 .00 -2.976 598 Equal variances not assu 4.981 69.730 000 -2.976 598 How many participants were there in the whole study? What was mean stress score for Group 1? What was the standard deviation for the stress scores for Group 1? What was mean stress score for Group 2? What was the standard deviation for the stress scores for Group 2? What is the correct t-statistic for this output? Whine eith not side - What are the correct degrees of freedom for this output? Yes or No, is there a statistically significant difference between Group 1 & Group 2? 1 good el Chshoqque asshequit 2 silo N 10 Which group had lower stress scores? who es . 5 quotd and