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PSYC 354 HOMEWORk 5

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Question;PSYC 354Be sure you have reviewed this module/week?s lessons and presentations along with the practice data analysis before proceeding to the homework exercises. Complete all analyses in SPSS, and then copy and paste your output and graphs into your homework document file. Number all responses. Answer any written questions (such as the text-based questions or the APA Participants section) in the appropriate place within the same file. Review the ?Homework Instructions: General? document for an example of how homework assignments must look.These questions are based on the Nolan and Heinzen reading and end-of-chapter questions.3. Fill in the blanks: A z-score is based on a distribution of _____________, while a z-4. End-of-chapter problems: Remember to show work to receive partial credit where applicable. For help working on these problems, refer to the presentation from this Open the ?Lesson 21 Exercise File 1? document (found in the course?s Assignment a. Create a histogram of the anxiety raw scores and paste it into your homework b. Using the descriptives method covered in the presentation and chapter, transform the anxiety raw scores to z-scores, creating a new variable called ?z_anxiety.? Paste the output of descriptive statistics in your homework document. These descriptive c. Remember that the mean of a standard normal distribution is z = 0 and the standard deviation is 1. What is the z-score that is closest to 0 (on either side of the mean) in your data set? What is the z-score that is the farthest from 0 (on either side of the Page 1 of 4PSYC 354d. Based on the histogram from (a) and the answers to (c), would you describe the anxiety data as being normally distributed? Why or why not? Support your answer with information from the chapter and presentations regarding normal and standard 1. The following data represent IQ scores of a sample of 30 high school students. In the general population, IQ scores have a mean of 100 and a standard deviation of 15. a. Generate descriptive statistics and a histogram for this variable. Based on the data and graph, choose 1 measure of central tendency and 1 measure of dispersion (variability) that best describes the data set. Justify why you chose these measuresb. In your data set, standardize the IQ scores by transforming them into z-scores under a new variable ?ZIQ.? Using your data set as a reference, what z-score corresponds to a raw IQ score of 115? To a raw IQ score of 60? To a raw IQ score c. Based on what you have been told about IQ scores in the beginning of the problem, does this sample?s distribution seem to reflect the distribution of IQ 1. (Non-SPSS) A cognitive psychologist wants to find out whether playing Minecraft? affects fourth graders? scores on a visuospatial task. He assigns 30 fourth graders to 1 of 2 groups. Group 1 plays Minecraft? for 20 minutes, then completes the visuospatial task. Page 2 of 4PSYC 3542. (Non-SPSS) A clinical psychologist wants to test a new long-term treatment program for people diagnosed with bipolar disorder. She assigns 20 participants to the new treatment 3. (SPSS) A criminal psychologist wants to examine the level of narcissistic personality traits between those who are diagnosed with antisocial personality disorder (ASPD) and those who do not qualify for ASPD. She administers a measure of narcissistic personality traits where higher scores indicate higher levels of narcissism and scores range from 0?a. Create a new SPSS data file for these scores. Your file must have 2 variables: diagnosis and score. Your diagnosis variable must be set up as a 1-column grouping variable with 2 groups (diagnosis, no diagnosis) coded numerically. This will be much like the gender variable you created in a previous module/week. For example, if you code ASPD Diagnosis as 1 and No ASPD Diagnosis as 2, then All ASPD Diagnosis scores from the table above will appear in a similar fashion. Page 3 of 4PSYC 354b. Compute descriptive statistics by diagnosis (that is, for each of the two groups in one table) using similar steps to those covered in Green and Salkind?s Lesson 21 and in the Module/Week 3 presentation (HS GPA scores by Gender). Paste this into your homework c. Construct a boxplot to show the difference between the mean scores of the 2 groups.Page 4 of 4

 

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