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Bivariate Correlation Analyses       Checking for nonlinear relationsh Bivariate Correlation Analyses       Checking for nonlinear relationsh

Bivariate Correlation Analyses Checking for nonlinear relationsh - PDF document

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Bivariate Correlation Analyses Checking for nonlinear relationsh - PPT Presentation

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Bivariate Correlation Analyses Checking for nonlinear relationship, etc. … Graphs à Scatter · Click on "Simple" icon and click "Define" button · Select x- and y-axis variables No obvious non-linear aspects -- go ahead with correlation analyses Analyze à Correlate à Bivariate · Move desired variables into the "Variables" window Analytic subscore of GRE660620580540520 grua gpa -- 4.02.52.0 NHST: Test of bivariate correlation using F- H0: There is no linear relationship between GREA and 1st year grad GPA among Psychology graduate students at UNL. a. Based on computer output r = .643, p -- reject H0: b. Based on F- .643² .413 .413 F = ------------------------ = --------------- = ----------- = 103.25 (1 - .643²) / (N - 2) .587 / 138 .004 &#x .00; ;F(1, 120, .01) = 6.85 F 103.25 F-crit 6.85 Reject H0: and conclude GREA and 1st year grad GPA are correlated among Psych graduate students at UNL. Writeup examples: Higher GREA scores were associated with higher first year GPA, r(140) = .643, p . Those with higher GREA scores tended to have higher first year GPA, r( = .643, p . Clinical students had a higher average first year GPA than did the experimental students (coded 0 and 1, respectively), r( = -, p = .028. Clinical students tended to have a higher first year GPA than the experimental students (coded 0 and 1, respectively), r( = -, p = .028. r² N = sample size F = ------------------------ (1 - r²) / (N - 2) Find F-critical using df = 1 & N- Correlations Pearson Correlation Sig. (2-tailed) N Pearson Correlation Sig. (2-tailed) N Pearson Correlation Sig. (2-tailed) N Pearson Correlation Sig. (2-tailed) N Pearson Correlation Sig. (2-tailed) N 1st year graduate gpa --criterion variable Analytic subscore of GRE Quantitative subscore ofGRE Verbal subscore of GRE 1=clinical & 2 =experimental 1st yeargraduate gpa-- criterionvariable of GRE Quantitativesubscore ofGRE of GRE 1=clinical & 2= Correlation is significant at the 0.01 level (2-tailed).**. Correlation is significant at the 0.05 level (2-tailed).*.