All information is on the assignment attached.
STC103E HOMEWORK #4 (Due at the beginning of the class on Monday, October 26. Please submit your homework to the Blackboard) Name: __________________________________ Research Scenario: Assume you are conducting a research about car noise. You randomly selected a sample of 36 cars from a dealer. There are five variables in this study: 1) Car ID; 2) Noise score (in dB); 3) Type of car (1=economy car, 2=luxury car); 4) Country of origin (1=U.S., 2=Japan); 5) Size of the car (1=small, 2=medium, 3= large). Instructions: 1) Use the SPSS dataset on Blackboard (HW4 SPSS data.sav) to run APPROPRIATE tests to answer two research questions. 2) Run appropriate tests to answer the following research questions (RQ): · RQ1: How dose size of the car influence noise score of the car? · RQ2: How do type of car and country of origin influence the noise score of a car? Please Answer the Following Questions: A. Based on the research questions, identify IV(s) and DV. Formulate your null hypotheses (H0) and research hypotheses (H1) for EACH research question. Please note that we will be conducting two-tailed tests, so the hypotheses should be non-directional. For RQ1: What are the IV(s) and DV (please identify and list each below): (1 point) Formulate your null hypothesis/hypotheses and research hypothesis/hypotheses below. (1 point) For RQ2: What are the IV(s) and DV (please identify and list each below): (2 points) Formulate your null hypothesis/hypotheses and research hypothesis/hypotheses below. (3 points) B. Run your statistical separately to answer RQs and test hypotheses. For each RQ, please: 1) Select the appropriate type of statistical test and run the analysis in SPSS; 1) Paste the SPSS outputs that contain the key information needed to answer each RQ; 2) Report and interpret your conclusion for each RQ (following the APA style discussed in our class exercise). For RQ1: 1) Which test do you plan to use, t-test, One-way ANOVA, or Two-way ANOVA? (1 point) 2) Run the test and paste SPSS outputs here (Descriptive Statistics Table, Levene’s test (test of homogeneity of variances), and ANOVA test Table) 3) Do you need to run post-hoc tests? Explain why (in one sentence). If the answer is no, go to question (4); If the answer is yes, then run post-hoc tests and paste your outputs. (1 point) 4) Report and interpret your conclusion (Follow the APA style discussed in class). (4 points) For RQ2: 1) Which test do you plan to use, t-test, One-way ANOVA, or Two-way ANOVA? (1 point) 2) Run the test and paste SPSS outputs here (Between-subjects Factors, Descriptive Statistics Table, Levene’s test, and ANOVA test Table (test of between-subjects effects). 3) Do you need to run post-hoc tests for main effects? Explain why (in one sentence). If the answer is no, go to question (4); If the answer is yes, then run post-hoc tests and paste your outputs. (1 point) 4) Is there significant interaction between IVs? If the answer is no, go to question (5); If yes, request a plot from SPSS and paste your plot here. (1 point) 5) Report and interpret the results of main effects and interaction effect (Follow the APA style discussed in class). (4 points) 1