The Percentile Table percentile to a range of standardised ...

The Percentile Table below converts percentile ranks from the 99th percentile to a range of standardised scoring systems. The percentile rank is the point in a distribution at or below which the scores of a given percentage of individuals fall. Because of central tendency percentiles do not have equal units of measurement and can be interpreted as exaggerating differences near the mean.

Percentile

99 98 98 97 96 96 95 94 94 93 92 91 91 90 88 87 86 84 82 79 77 73 70 66

Standard score

133+ 132 130 129 127 126 124 123 123 122 121 120 120 119 118 117 116 115 114 112 111 109 108 106

Sten score

10 (Max) 10 10 9 9 9 9 9 9 8 8 8 8 8 8 8 8 8 7 7 7 7 7 6

Stanine Score

9 (Max) 9 9 9 9 8 8 8 8 8 8 8 8 8 7 7 7 7 7 7 6 6 6 6

T score

72+ 71 70 69 68 67 66 65.5 65 64.5 64 63.5 63 62.5 62 61 60.5 60 59 58 57 56 55 54

SD's from the mean (Z score) 2.20 or more

2.10 2.00 1.90 1.80 1.70 1.60 1.55 1.50 1.45 1.40 1.35 1.30 1.25 1.20 1.10 1.05 1.00 0.90 0.80 0.70 0.60 0.50 0.40

Percentile

61 58 55 50 45 41 37 33 30 27 24 21 19 16 14 12 10 8 7 5 5 4 3 2 1

Standard score

104 103 102 100 98 97 96 94 93 91 90 88 87 85 84 82 81 79 78 76 75 73 72 70 67 or lower

Sten score

6 6 6 6 5 5 5 5 5 4 4 4 4 4 3 3 3 3 3 2 2 2 2 2 1 (Min)

Stanine Score

6 5 5 5 5 5 4 4 4 4 4 3 3 3 3 3 2 2 2 2 2 1 1 1 1 (Min)

T score

53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 28 or lower

SD's from the mean (Z score)

0.30 0.20 0.10

0 -0.10 -0.20 -0.30 -0.40 -0.50 -0.60 -0.70 -0.80 -0.90 -1.00 -1.10 -1.20 -1.30 -1.40 -1.50 -1.60 -1.70 -1.80 -1.90 -2.00 -2.20 or lower

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