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Table 2 Comparison of tip values measured for the two groups

From: Three-dimensional assessment of teeth first-, second- and third-order position in Caucasian and African subjects with ideal occlusion

Africans—tip Caucasians—tip Comparison
  n Mean Standard deviation n Mean Standard deviation t test p level
TIP U7 58 −3.06 6.78 60 −3.88 10.60 0.51 ns
TIP U6 58 9.48 3.53 60 10.26 5.54 −0.98 ns
TIP U5 58 5.96 5.84 60 9.64 4.16 −3.93 <0.001
TIP U4 58 3.29 4.45 60 7.67 4.28 −5.45 <0.001
TIP U3 58 8.23 5.20 60 9.96 4.81 −1.87 ns
TIP U2 58 9.23 3.87 60 9.99 3.69 −1.10 ns
TIP U1 58 3.68 3.55 60 4.53 2.84 −1.44 ns
TIP L7 58 12.65 5.83 60 14.20 6.47 −1.37 ns
TIP L6 58 6.30 5.36 60 10.99 2.78 −5.95 <0.001
TIP L5 58 3.60 4.02 60 6.90 3.09 −4.99 <0.001
TIP L4 58 2.95 3.89 60 6.06 3.36 −4.63 <0.001
TIP L3 58 3.478 4.850 60 5.91 3.98 −2.98 0.004
TIP L2 58 −0.26 3.01 60 0.14 4.46 −0.57 ns
TIP L1 58 −1.13 3.30 60 0.00 4.46 −1.57 ns
  1. ns not significant.