DATA ENTRY RAW DIFFERENCE STANDARDISED EFFECT SIZE (From Hedges and Olkin p80) Outcome measure Treatment group Control group pooled standard deviation p-value for difference in SDs Mean Difference p-value for mean diff (2-tailed T-test) Confidence Interval for Difference Effect Size Bias corrected (Hedges) Standard Error of E.S. estimate Confidence Interval for Effect Size Effect Size based on control gp SD N-2 bias correction factor approx mean n SD mean n SD lower upper lower upper P vs L 12.5 15 25.6 25 26 8.2 16.68 0.00 -12.50 #NUM! -23.44 -1.56 -0.75 -0.73 0.33 -1.39 -0.08 -1.52 0.00 #DIV/0! 0.00 #DIV/0! #NUM! #NUM! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! 2 0.5642 0.571428571 0.00 #DIV/0! 0.00 #DIV/0! #NUM! #NUM! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0! 3 0.7236 0.727272727 4 0.7979 0.8 5 0.8408 0.842105263 6 0.8686 0.869565217 % confidence interval: 95 7 0.8882 0.888888889 p: 0.05 8 0.9027 0.903225806 Z-value: 1.959963985 9 0.9139 0.914285714 10 0.9228 0.923076923 11 0.93 0.930232558 13 0.9410 0.941176471 14 0.9453 0.945454545 15 0.9490 0.949152542 16 0.9523 0.952380952 17 0.9551 0.955223881 18 0.9577 0.957746479 19 0.9599 0.96 20 0.9619 0.962025316 21 0.9638 0.963855422 22 0.9655 0.965517241 23 0.9670 0.967032967 24 0.9684 0.968421053 25 0.9699 0.96969697 26 0.9708 0.970873786 27 0.9719 0.971962617 28 0.9729 0.972972973 29 0.9739 0.973913043 30 0.9748 0.974789916 31 0.9756 0.975609756 32 0.9764 0.976377953 33 0.9771 0.977099237 34 0.9778 0.977777778 35 0.9784 0.978417266 36 0.9790 0.979020979 37 0.9796 0.979591837 38 0.9801 0.98013245 39 0.9806 0.980645161 40 0.9811 0.981132075 41 0.9816 0.981595092 42 0.982 0.982035928 43 0.9824 0.98245614 44 0.9828 0.982857143 45 0.9832 0.983240223 46 0.9836 0.983606557 47 0.9839 0.983957219 48 0.9843 0.984293194 49 0.9846 0.984615385 50 0.9849 0.984924623 52 0.9855 54 0.9860 56 0.9865 58 0.9870 60 0.9874 62 0.9879 64 0.9882 66 0.9886 68 0.9889 70 0.9892 72 0.9895 74 0.9898 76 0.9901 78 0.9904 80 0.9906 85 0.9912 90 0.9916 95 0.9921 100 0.9925 105 0.9928 110 0.9932 115 0.9935 120 0.9937 130 0.9942 140 0.9946 150 0.9950 160 0.9953 180 0.9958 200 0.9962 220 0.9966 240 0.9969 260 0.9971 280 0.9973 300 0.9975 350 0.9979 400 0.9981 500 0.9985 600 0.9987 700 0.9989 800 0.9991 1000 0.9992 1500 0.9995 2000 0.9996 2500 0.9997 3000 0.9997 4000 0.9998 6000 0.9999