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Temple - CJ 2602 - Class Notes - Week 12

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Temple - CJ 2602 - Class Notes - Week 12

School: Temple University
Department: Criminal Justice
Course: Crikibal Justice Research and Analysis
Professor: Tba
Term: Summer 2015
Tags: CriminalJusticeStatistics and correlation
Name: Criminal Justice Notes Correlation
Description: A bit short but correlation is pretty simple and straight forward
Uploaded: 11/28/2017
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background image Correlation 5 steps – just like t-test  SPSS – easiest table  Used for when both variables are ratio/scale  Variable 1: ratio/scale
Variable 2: ratio/scale 
Positive correlation (both variables increase) 
Negative correlation (both variables decrease) 
(AT THE SAME TIME)  Step 1: state the hypothesis  o H 0  = there is no correlation between _______ and ________ o H 1  = there is a (positive/negative) correlation between _______  and ________ Step 2: df= N-2  Step 3: Need df and alpha = 0.05 (or 0.01) finding the t crit  Step 4: t – obt (always given)  Step 5: compare t-crit and t-obt  If H 1  go to Step 6: Pearson Correlation Coefficient  o = r (same as gamma/somers D) 
o -1 to - .75 (strong); -.75 to -.25 (moderate); -.25 to .25 (weak); .
25 to .75 (moderate); .75 to 1 (strong)  Step 7: r 2  = coefficient of magnitude  o r X r = 
o will always be positive 
o convert it to a percent 
o % of the change in the DV can be explained in the IV 

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School: Temple University
Department: Criminal Justice
Course: Crikibal Justice Research and Analysis
Professor: Tba
Term: Summer 2015
Tags: CriminalJusticeStatistics and correlation
Name: Criminal Justice Notes Correlation
Description: A bit short but correlation is pretty simple and straight forward
Uploaded: 11/28/2017
1 Pages 10 Views 8 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
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