How do I determine an effect size for a given variable in SAS example "statistics anxiety score"

[jmoseley]

Title Predictin final exam score from stats anxiety scores, study minutes, and midterm exam scores;

data Predicting final exam scores;

input finalexamscore statsstressacore studyminutes midtermexamscore;

cards;

40 48 41 45

49 49 55 40

71 73 69 69

42 42 52 51

54 49 46 52

45 49 45 41

63 52 66 69

55 58 54 47

46 47 46 39

39 42 35 38

62 63 66 45

52 50 50 55

62 71 65 59

47 41 41 40

53 47 50 52

54 50 41 50

49 53 47 44

53 49 52 49

52 51 61 38

55 69 60 50

;

proc corr;

var finalexamscore = statsstressacore studyminutes midtermexamscore;

proc reg;

model finalexamscore = statsstressacore studyminutes midtermexamscore /stb scorr2 p r vif;

plot residual. * predicted.;

output out=res residual=resid predicted=pred;

proc univariate plot;

var resid;

run;

[Reeza · Accepted solution]

Am I missing something, isn't the effect size in your parameter estimate table?