Table 4 Comparison of our African tip values with those measured by Andrews

TIP U7

58

−3.06

6.78

240

.39

5.69

−3.58

<0.001

TIP U6

58

9.43

3.53

240

5.73

1.90

7.71

<0.001

TIP U5

58

5.96

5.84

240

2.82

1.52

4.07

<0.001

TIP U4

58

3.29

4.45

240

2.65

1.69

1.07

ns

TIP U3

58

8.23

5.20

240

8.40

2.97

−.24

ns

TIP U2

58

9.23

3.87

240

8.04

2.80

2.20

0.031

TIP U1

58

3.68

3.55

240

3.59

1.65

.18

ns

TIP L7

58

12.65

5.83

240

2.94

2.05

12.50

<0.001

TIP L6

58

6.30

5.36

240

2.03

1.14

6.03

<0.001

TIP L5

58

3.60

4.02

240

1.54

1.35

3.84

<0.001

TIP L4

58

2.95

3.89

240

1.28

1.90

3.19

0.002

TIP L3

58

3.478

4.850

240

2.48

3.28

1.49

ns

TIP L2

58

−.26

3.01

240

.38

1.47

−1.57

ns

TIP L1

58

−1.13

3.30

240

.53

1.29

−3.77

<0.001