How to Design and Evaluate Research in Education
Data analysis – correlation coefficient, r, and plot (r is -1 to +1, and the closer to plus or minus 1, the stronger the relationship) Chapter 15 - continued Correlation Research (Interpreting Correlation Coefficients) General guideslines: +.75 to +1.0 Very strong relationship +.50 to +.75 Moderate strong relationship +.25 to +.50 Weak ... ................
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