SPSS5_kelseydonaldson_515B01

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PSYC 515 H OMEWORK : C HI -S QUARE SPSS A SSIGNMENT I NSTRUCTIONS O VERVIEW This worksheet is designed to assess your ability to perform, interpret, report, and graphically present non-para- metric tests using SPSS. Non-parametric tests are used for nominal data and/or when data do not meet the as- sumptions required of a parametric test. Knowledge of these tests provide fundamental skills to critically evalu- ating and producing research in one’s field. I NSTRUCTIONS Be sure you have reviewed this module’s assigned readings and presentations before completing this assign- ment. This assignment is worth 50 points. Each question is worth 3 content points except where otherwise indi- cated (results write-ups are 4 pts each- 45 content points total). Five (5) points are assigned to general format- ting. 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 of “format” points. · 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). Re- member 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: SPSS5_JohnDoe_515B01 Scenario 1 In the recent COVID-19 pandemic, a local precinct observed that of the 75 people who voted, 25 identified as republican, 30 were democrat, and 20 were “other”. Is this similar to pre-pandemic voting based on political party affiliations? At that same precinct, pre-pandemic voting based on political party affiliation was: 35% re- publican, 44% democrats, and 21% “other”. Enter in the 75 data points and expected values into SPSS to con- duct the appropriate statistical test. 1. Name the the variable of interest in the scenario. How many levels does it have, and what are they? ANSWER The 75 individuals who cast their votes are the variable of interest. The 75 people who voted are the variable of interest in this scenario. It signifies that we are intrigued by studying the political party affiliations of these 75 individuals. Three levels of the variable align with the three different political parties: republican, democrat, and other. Based on their political affiliation, each individual falls into different categories or groups represented by these levels. By studying this variable, we can conclude if there has been a noteworthy transformation in voting habits during the COVID-19 situation when compared to times before the pandemic. 2. Calculate the expected frequencies for each of the levels of your variable. Clearly label each group and show all work involving your calculations. Page 1 of 10

PSYC 515 ANSWER The calculated amount for the republicans would be 26.25 by multiplying 35% with 75. If we consider the democrats, the outcome will be 33 by multiplying 44% with 75 The remaining group would have a value of 21% times 75, resulting in 15.75. I started with finding the difference between the observed and expected values for each group. Then I squared this difference before dividing it by the expected value. The republicans would perform the calculation (25-26.25)^2/26.25. The democrats attach significance to the expression (30-33)^2/33. The calculation for the other group involves using (20-15.75)^2/15.75. We can calculate the chi-squared statistic of 1.23 by adding these three values. The calculations for finding the values were done correctly. Observing a decrease of 33%, the value recorded was -25. The product of 75 and 35 equals to 2,625 divided by 100 which gives us 26.25. With an observation count of thirty at a percentage value of forty percent, multiplying it with seventy-five and dividing the product by one hundred yielded an outcome of thirty-three 20 (26.7%) Observed- Other- 75 x 21= 1575/100= 15.75 3. Paste all relevant statistical output in the space provided below: Page 2 of 10

PSYC 515 ANSWER 4. Present the results using APA format. This includes a full write-up to include a complete statistical no- tation as shown in the weekly presentations. Make sure to describe what the conclusions mean in gen- eral terms. Additional examples of APA results sections are also available in the “Helpful Hints” doc- ument. (4 pts) ANSWER Page 3 of 10

PSYC 515 Whether the political party affiliation of a local precinct's observed post COVID-19 pan- demic is similar to political party affiliation before the pandemic was examined using a Chi Square Goodness of Fit test. No statistical distinction was observed between the rate prior to and following COVID-19. The calculated X2(2, N=75) is 1.479 and the cor- responding p-value is .477. The null hypothesis failed to be rejected. Scenario 2 Is there a relationship between one’s gender and whether one owns a dog, cat, or reptile? Use the data pro- vided in the table below to answer the following questions. Dog Cat Reptile Row Totals Male 20 17 11 48 Female 25 23 5 53 Column totals 45 40 16 101 5. Name the two variables of interest and the number of levels in each. Then, list the levels for each vari- able. ANSWER Variable 1: Gender (male/female) Variable 2: Pet (dog/cat/reptile) Gender two levels; male & female Pet type three levels; dog, cat, & reptile . 6. Paste all relevant statistical output in the space provided below. ANSWER Page 4 of 10

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