这就是典型的analysis paralysis. 看看数据，自己拿主意，有什么好多分析的？

来源: Francine 于 2017-10-31 08:50:50 [档案] [博客] [旧帖] [给我悄悄话] 本文已被阅读：次 (82198 bytes)

回答: 关于新SAT，听到一个说法由 OneManArmy 于 2017-10-31 08:22:51

ACT：

ACT Scores and High Precision 6-Digit Percentiles

ACT Composite Score	Percentile
36	99.9585
35	99.6962
34	99.0642
33	98.0761
32	96.7558
31	95.1067
30	93.0592
29	90.6171
28	87.7440
27	84.3200
26	80.3561
25	75.8399
24	70.7371
23	65.1384
22	59.1688
21	52.8696
20	46.3758
19	39.8415
18	33.2960
17	26.8432
16	20.6258
15	14.7890
14	9.5555
13	5.2653
12	2.3433
11	0.8449
10	0.2846
9	0.1084
8	0.0451
7	0.0180
6	0.0068
5	0.0025
4	0.0007
3	0.0003
2	0.0001
1	0.0000

Methodology: How did we come up with these percentiles? To calculate them, we used official data released by the ACT that gives the exact number of students who earned certain scores. Using that information, we summed the exact number of students to get the percentile. Within a single score group (e.g. students scoring exactly a 34), we presume exactly half are above.

SAT

Old SAT Scores, Imputed New SAT Scores, and High Precision 6-Digit Percentiles

Old SAT Score	New SAT Score	Percentile
2400	1600	99.9826
2390	1593	99.9581
2380	1587	99.9411
2370	1580	99.9157
2360	1573	99.8801
2350	1567	99.8413
2340	1560	99.7950
2330	1553	99.7354
2320	1547	99.6664
2310	1540	99.5923
2300	1533	99.5141
2290	1527	99.4276
2280	1520	99.3395
2270	1513	99.2459
2260	1507	99.1397
2250	1500	99.0273
2240	1493	98.9104
2230	1487	98.7855
2220	1480	98.6515
2210	1473	98.5063
2200	1467	98.3528
2190	1460	98.1924
2180	1453	98.0238
2170	1447	97.8469
2160	1440	97.6597
2150	1433	97.4642
2140	1427	97.2555
2130	1420	97.0358
2120	1413	96.8045
2110	1407	96.5559
2100	1400	96.2958
2090	1393	96.0276
2080	1387	95.7529
2070	1380	95.4650
2060	1373	95.1588
2050	1367	94.8398
2040	1360	94.5099
2030	1353	94.1634
2020	1347	93.7955
2010	1340	93.4120
2000	1333	93.0201
1990	1327	92.6195
1980	1320	92.2101
1970	1313	91.7854
1960	1307	91.3402
1950	1300	90.8779
1940	1293	90.3975
1930	1287	89.9012
1920	1280	89.3846
1910	1273	88.8429
1900	1267	88.2867
1890	1260	87.7155
1880	1253	87.1305
1870	1247	86.5287
1860	1240	85.9086
1850	1233	85.2697
1840	1227	84.6085
1830	1220	83.9373
1820	1213	83.2498
1810	1207	82.5362
1800	1200	81.7995
1790	1193	81.0451
1780	1187	80.2791
1770	1180	79.4952
1760	1173	78.6945
1750	1167	77.8770
1740	1160	77.0333
1730	1153	76.1735
1720	1147	75.3036
1710	1140	74.4108
1700	1133	73.4994
1690	1127	72.5711
1680	1120	71.6280
1670	1113	70.6719
1660	1107	69.7021
1650	1100	68.7169
1640	1093	67.7098
1630	1087	66.6887
1620	1080	65.6533
1610	1073	64.5884
1600	1067	63.5074
1590	1060	62.4244
1580	1053	61.3263
1570	1047	60.2113
1560	1040	59.0780
1550	1033	57.9348
1540	1027	56.7944
1530	1020	55.6413
1520	1013	54.4725
1510	1007	53.2926
1500	1000	52.1009
1490	993	50.9224
1480	987	49.7397
1470	980	48.5449
1460	973	47.3556
1450	967	46.1566
1440	960	44.9528
1430	953	43.7531
1420	947	42.5425
1410	940	41.3276
1400	933	40.1243
1390	927	38.9328
1380	920	37.7371
1370	913	36.5401
1360	907	35.3573
1350	900	34.1848
1340	893	33.0214
1330	887	31.8637
1320	880	30.7209
1310	873	29.5865
1300	867	28.4646
1290	860	27.3632
1280	853	26.2750
1270	847	25.1993
1260	840	24.1399
1250	833	23.1032
1240	827	22.0875
1230	820	21.0863
1220	813	20.1109
1210	807	19.1715
1200	800	18.2462
1190	793	17.3384
1180	787	16.4691
1170	780	15.6303
1160	773	14.8145
1150	767	14.0277
1140	760	13.2678
1130	753	12.5365
1120	747	11.8273
1110	740	11.1387
1100	733	10.4869
1090	727	9.8699
1080	720	9.2785
1070	713	8.7117
1060	707	8.1716
1050	700	7.6531
1040	693	7.1558
1030	687	6.6918
1020	680	6.2537
1010	673	5.8385
1000	667	5.4509
990	660	5.0868
980	653	4.7419
970	647	4.4099
960	640	4.1003
950	633	3.8120
940	627	3.5352
930	620	3.2731
920	613	3.0288
910	607	2.7996
900	600	2.5786
890	593	2.3712
880	587	2.1790
870	580	1.9942
860	573	1.8196
850	567	1.6576
840	560	1.5043
830	553	1.3616
820	547	1.2274
810	540	1.1014
800	533	0.9862
790	527	0.8816
780	520	0.7862
770	513	0.6972
760	507	0.6150
750	500	0.5381
740	493	0.4663
730	487	0.4022
720	480	0.3430
710	473	0.2897
700	467	0.2430
690	460	0.2014
680	453	0.1642
670	447	0.1312
660	440	0.1047
650	433	0.0831
640	427	0.0651
630	420	0.0484
620	413	0.0365
610	407	0.0278
600	400	0.0112

Methodology: How did we calculate the percentiles? We used real official data released by the College Board on the exact number of students who earned a certain score. Then, we summed the exact number of students (not a survey, not an estimate, the exact number of students to the single individual) to get the percentile. Within a score group (e.g. those scoring exactly 2110), we presume exactly half are above, and half are below, so that 600 does not correspond to 0.0000 percentile, nor does a perfect 2400 correspond to 100.0000 percentile exactly.