PSYC 515 SPSS M1 REVIEW SPSS WORKSHEET INSTRUCTIONS Answered 2024/2025 Verified .

PSYC 515 SPSS M1 REVIEW SPSS WORKSHEET INSTRUCTIONS Answered 2024/2025 Verified . HOMEWORK: REVIEW SPSS WORKSHEET INSTRUCTIONS OVERVIEW This worksheet is designed to assess your ability to perform, interpret, report, and graphically represent the following statistical tests using SPSS and standard reporting conventions as covered in this course: correlations, regression, independent samples t tests, and correlated groups t tests. These are standard tests in our field and are foundational to the more sophisticated research designs. Knowledge of these tests provide fundamental skills to critically evaluating and producing research in one’s field. INSTRUCTIONS Be sure you have reviewed this module’s assigned readings and presentations before completing this assignment. This includes using ensuring the homework is completed and submitted according to the instructions, SPSS output and images are legible and relevant, and that basic college level writing skills (e.g., grammar) are used in the write-ups. Answers should be placed where indicated (e.g., “ANSWER”). Note: all questions must be attempted to be eligible for full credit. Please note that for all problems in this course, the standard cut-off (alpha) for a test of significance will be .05, and you always report the exact power unless SPSS output states p=.000 (you’d report p.001). Also, remember that we divide the p-value in half when reporting one-tailed tests with 1 – 2 groups. Also – remember to check your graphs! You often have to ADD the y – axis title. • Submit the file as a WORD document (.doc or .docx). Make sure the filename of your submission includes your full name, course and section. o Example: SPSS1_JohnDoe_515B01 Scenario 1 A major university would like to improve its tarnished image following a large on-campus scandal. Its marketing department develops a short television commercial and tests it on a sample of n = 10, the first ten students who entered a housing commons area who agreed to participate. Attitudes about the university are measured with a short questionnaire, both before and after viewing the commercial. Attitudes were on a scale of 0 – 20, which higher numbers reflecting better attitudes. Use the provided data to examine whether the commercial improved the university’s image. The data are as follows: Person X1 (before) X2 (after) A 15 15 B 11 13 C 10 18 D 11 12 E 14 16 F 10 10 G 11 19 H 10 20 I 12 13 J 15 18 1. In this specific scenario, what is the independent variable? Is it between or within subjects? How many levels does it have, and what are they? ANSWER The independent variable is the commercial variable that is being displayed. It is considered within subjects because the same indivduals were tested before and afer watching the commercial to determine the attitude scale. It contains two levels because it measures the attitude before and after the TV commercial. 2. In this specific scenario, what is the dependent variable? What is its scale of measurement (nominal, ordinal, or scale)? ANSWERThe depedendent variable is the attitude scale being measured from 0 to 20 before and after the TV commercial. The scale of measurement is scale. 3. Paste all relevant statistical output in the space provided below: ANSWER 4. Create an appropriate graph in SPSS and paste it in the space provided below: ANSWER 5. Present the results using APA format. This includes a full write-up to include a complete statistical notation as shown in the weekly presentations. The write-up also needs interpretation. If significant, state how. If it is not significant, what does that mean in layman’s terms? Additional examples of APA results sections are also available in the “Helpful Hints” document. ANSWERTo test the hypothesis that the attitude before the commercial (M=11.90, SD= 2.025) and the attitude after the TV commercial (M =15.40, SC= 3.340) improved after viewing the TV commercial S dependent samples t-test was performed and it found a significant difference between the attitude before the participants viewed the commercial from after they viewed the commercial t (9) = -2.976, p .05. So, the null hypothesis is rejects that the attitudes improved anout the school’s image after viewing the TV commercial. 6. Do you think this experiment has more internal validity or external validity? Explain your answer. (You may want to review chapters 9-10 in your Jackson e-book). ANSWERThis specific test has more external validity because the participants that were used within the study were generalized. They only used the first ten individuals that walked into that housing common’s area which would specify that the students who were chosen were ones that precisely lived in that housing area but there was no extra information about if they attended the local college, what grade they were in, or their major. Without this specific information, the assumption can be made that those ten people were random and could be a possible manipulation to the study due to their lot to little affiliation with the commercial in general.