Before revision: + Standard/Z scores, percentages, percentiles, and sten scores Z-scores < −2.0−2.0 … −1.5−1.5 … −1.0−1.0 … −0.5−0.5 … −0.0+0.0 … +0.5+0.5 … +1.0+1.0 … +1.5+1.5 … +2.0> +2.0 Percent 2.3%DIF < 4.4% 9.2% 15.0% 19.1% 19.1% 15.0% 9.2% 4.4% 2.3% Percentile 1.2 4.5 11.3 23.4 40.5 59.6 76.6 88.7 95.5 98.9 Sten 1 2 3 4 5 6 7 8 9 10 Percentiles are the percentile of the sten score (which is the mid-point of a range of z-scores).
After revision: + Standard/Z scores, percentages, percentiles, and sten scores Z-scores < −2.0−2.0 … −1.5−1.5 … −1.0−1.0 … −0.5−0.5 … −0.0+0.0 … +0.5+0.5 … +1.0+1.0 … +1.5+1.5 … +2.0> +2.0 Percent 2.28%DIF > 4.41% 9.18% 14.99% 19.15% 19.15% 14.99% 9.18% 4.41% 2.28% Percentile 1.14 4.48 11.27 23.36 40.43 59.57 76.64 88.73 95.52 98.86 Sten 1 2 3 4 5 6 7 8 9 10 Percentiles are the percentile of the sten score (which is the mid-point of a range of z-scores).