C 101.45 108.12 C 21.53 17.75 ±3.25 ±2.90 ±2.30 ±2.05 _N_ = 20 17 ----------------------------------------------------------------- I V .887 .822 I 101.64 99.42 I 24.76 17.63 ±.04 ±.05 ±3.56 ±2.73 ±2.52 ±1.93 V I R .799 .832 V 100.59 111.58 V 26.71 19.78 ±.05 ±.05 ±3.84 ±3.06 ±2.72 ±2.16 I C .818 .890 R 94.59 101.42 R 22.10 12.56 ±.05 ±.03 ±3.18 ±1.94 ±2.25 ±1.37 C 97.00 102.68 C 22.52 17.71 ±3.24 ±2.74 ±2.29 ±1.94 _N_ = 22 19 ----------------------------------------------------------------- I V .793 .772 I 109.90 115.90 I 23.45 24.38 ±.08 ±.09 ±5.00 ±5.20 ±3.54 ±3.68 VI I R .497 .726 V 108.00 126.80 V 30.20 25.25 ±.16 ±.10 ±6.44 ±5.39 ±4.55 ±3.81 I C .798 .891 R 103.10 107.20 R 13.77 20.62 ±.08 ±.04 ±2.94 ±4.40 ±2.08 ±3.11 C 108.90 117.10 C 15.23 18.81 ±3.25 ±4.01 ±2.30 ±2.84 _N_ = 10 10 ----------------------------------------------------------------- I V .625 .504 I 99.29 98.92 I 11.11 11.45 ±.11 ±.14 ±2.00 ±2.14 ±1.42 ±1.51 VII I R .622 .709 V 109.43 115.23 V 14.07 17.43 and ±.11 ±.09 ±2.54 ±2.95 ±1.79 ±2.31 VIII I C .782 .730 R 97.00 98.85 R 12.59 15.77 ±.07 ±.09 ±2.27 ±3.26 ±1.61 ±2.09 C 102.43 95.85 C 13.49 17.72 ±2.43 ±3.31 ±1.72 ±2.34 _N_ = 14 13 ----------------------------------------------------------------- I V .685 .680 I 105.07 106.88 I 19.34 18.45 ±.04 ±.04 ±1.41 ±1.32 ±1.00 ±0.93 I R .568 .626 V 101.12 112.67 V 22.83 21.58 TOTAL ±.05 ±.04 ±1.67 ±1.54 ±1.18 ±1.09 I C .639 .702 R 92.40 102.91 R 22.65 15.27 ±.04 ±.04 ±1.66 ±1.09 ±1.17 ±0.77 C 98.08 106.27 C 21.48 18.19 ±1.57 ±1.30 ±1.11 ±0.92 _N_ = 85 89 ----------------------------------------------------------------- TABLE 8 ALL CORRELATIONS, MEANS, AND STANDARD DEVIATIONS OF QUOTIENTS BY GRADE, SHOWING PROGRESS FROM NOVEMBER, 1919 TO JUNE, 1920