week 2 homework.docx

# week 2 homework.docx - PSYC 510 HOMEWORK 2 Frequency Tables...

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PSYC 510 H OMEWORK 2 Frequency Tables and Graphs When submitting this file, be sure the filename includes your full name, course and section. Example: HW2_JohnDoe_510B01 Be 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, then copy and paste your output and graphs into your homework document file. Answer any written questions (such as the text-based questions or the APA Participants section) in the appropriate place within the same file. Part I: Concepts Answer all questions in the spaces provided. Use the following table to answer Question 1. This table depicts the scores of 50 students on an exam worth 100 points. 1) Use the information in the table to determine the percentages for each interval and the total frequency and percentage. Fill these into the blank boxes in the table. Depending on your rounding decisions, these may or may not add up to exactly 100% but should be very close. Table: Grouped Frequency Table Score Interval Frequency Percentages for each Interval 90-100 8 16 80-89 17 34 70-79 12 24 60-69 8 16 50-59 3 6 40-49 1 2 30-39 1 2 TOTAL 50 100 2) _histogram_______ look like bar graphs but typically display scale data. 3) A frequency distribution that is bell-shaped, symmetrical, and unimodal is _normal distribution . 4) A frequency distribution that has a tail trailing off to the left of the distribution is negative - skewed. 5) A frequency distribution of ages of residents at a juvenile halfway house is clustered around 14.5 with a long tail to the right. This distribution is _positive_ - skewed. 6) When a constraint prevents a variable from taking on values below a certain point, this is known as a(n) _floor_ effect.

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