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T test
1.
T – TEST
2.
Find the t
– value X1 X2 3 20 3 13 3 13 12 20 15 29 16 32 17 23 19 20 23 25 24 15 32 30 S.D ? a) 6.365 b) 8.183 c) 8.103 d) 8.334 T ? a) 1.256 b) 1.231 c) 1.895 d) 1.985
3.
SOLUTION X1 = 3+3+3+12+15+16+17+19+23+24+32 11 X1
= 167 11 X1 = 15.18 X2 = 20+13+13+20+29+32+23+20+25+15+30 11 X2 = 240 11 X2 = 21.81
4.
NO. X1 X2
X1 – X1 (X1 – X1) (X2 – X2) (X2 – X2) 1 3 20 12.18 148.3524 1.81 3.2761 2 3 13 12.18 148.3524 8.81 77.6161 3 3 13 12.18 148.3524 8.81 77.6161 4 12 20 3.18 10.1124 1.81 3.2761 5 15 29 0.18 0.0324 7.19 51.6961 6 16 32 0.82 0.6724 10.19 103.8361 7 17 23 1.82 3.3124 1.19 1.4161 8 19 20 3.82 14.5924 1.18 1.3924 9 23 25 7.82 61.1524 3.19 10.1761 10 24 15 8.82 77.7924 6.81 46.3761 11 32 30 16.82 282.9124 8.19 67.0761 TOTAL X1 = 167 X2 = 240 = 895.6364 = 443.7534 2 2
5.
S.D = ∑(X1
– X1) + ∑(X2 – X2) N1 + N2 – 2 S.D = 895.6364 + 443.7534 = 1339.3898 = 66.96949 11 + 11 – 2 20 S.D = 8.183 T = X1 – X2 N1*N2 = 15.18 – 21.81 11*11 = 6.63 121 S.D N1 + N2 8.183 11 + 11 8.183 22 T = 0.810 5.5 = 0.810 * 2.34 T = 1.8954 2 2
6.
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