Table 2 T tests for difference in the averages—quantitative values of n1 (5 to 12 years of age)

OB

277

67

64

54

57

NB

212

49

43

47

46

Means OB

9.56

47.04

45.3

33.76

27.53

Means NB

9.79

46.54

45.3

33.34

27.06

SD OB

1.84

3.63

4.32

4.45

2.68

SD NB

1.79

3.85

4.69

3.26

2.63

OB*

0.11

0.44

0.54

0.61

0.35

NB*

0.11

0.55

0.72

0.48

0.39

Difference of means

−0.231779

0.496497

0.002362

0.423089

0.465446

CI

95 %

95 %

95 %

95 %

95 %

IC

(−0.557135; 0.093576)

(−0.905768; 1.898762)

(−1.780811; 1.785535)

(−1.106945; 1.953123)

(−0.577590; 1.508483)

T value

−1.4

0.7

0

0.55

0.89

p value

0.62

0.484

0.998

0.584

0.378

DF

459

99

85

96

97