Paired Samples Test Paired Differences
t df
Sig. (2- tailed) Mean
Std.
Deviation
Std.
Error Mean
95% Confidence Interval of the
Difference
Lower Upper
Pair 1
AR_Min_1 - AR_Plus_1
-.00250 .00214 .00048 -.00350 -.00150 -5.225 19 .000
Paired Samples Statistics
Mean N
Std.
Deviatio n
Std. Error Mean
Pair 1 AR_Min_1 .0038 20 .00940 .00210
AR_Plus_1 .0063 20 .01004 .00224
Paired Samples Effect Sizes
Standardizera Point Estimate
95% Confidence Interval
Lower Upper
Pair 1 AR_Min_1 - AR_Plus_1 Cohen's d .00214 -1.168 -1.732 -.586
Hedges' correction .00218 -1.145 -1.698 -.575
a. The denominator used in estimating the effect sizes.
Cohen's d uses the sample standard deviation of the mean difference.
Hedges' correction uses the sample standard deviation of the mean difference, plus a correction factor.