T-Score Equivalents Table - ALSDE

T-Score Equivalents Table

Conversion of T-Scores to Standard Scores (Mean = 50; Standard Deviation = 10)

T-Score (M=50; SD=10)

90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51

Standard Score (SS)

(M=100; SD = 15)

160 158 157 155 154 152 151 149 148 146 145 143 142 140 139 137 136 134 133 131 130 128 127 125 124 122 121 119 118 116 115 113 112 110 109 107 106 104 103 101

T-Score (M=50; SD=10)

50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

Standard Score (SS)

(M= 100; SD= 15)

100 98 97 95 94 92 91 89 88 86 85 83 82 80 79 77 76 74 73 71 70 68 67 65 64 62 61 59 58 56 55 53 52 50 49 47 46 44 43 41 40

Directions: Locate the T-Score you want to convert in the left column. Read across to the right column to find the corresponding Standard Score.

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