Table 6 Statistical comparison of the results obtained by the proposed chemometric models and the official methods for the determination of PARA, ASC, CAF, and CPM in their pure powdered form

Mean

100.11

100.12

100.36

100.29

101.48

S.D.

1.42

1.67

1.66

0.58

0.88

Variance

2.02

1.85

2.74

0.34

0.79

n

5

5

5

5

5

Student’s t-test (2.036)

1.827

2.008

1.332

2.49

F value (6.39)

2.56

2.34

3.47

2.32

Ascorbic acid^[a]

Mean

99.80

99.51

100.03

99.60

98.46

S.D.

1.39

1.99

1.67

0.79

0.92

Variance

1.93

3.98

2.79

0.62

0.85

N

5

5

5

5

5

Student’s t-test (2.306)

1.797

1.068

1.84

2.100

F value (6.39)

2.27

4.68

3.28

1.37

Caffeine^[c]

Mean

98.53

98.51

97.80

100.49

99.58

S.D.

2.47

2.45

1.4

0.98

1.22

Variance

6.10

4.9

2.13

0.96

1.49

N

5

5

5

5

5

Student’s t-test (2.306)

0.850

0.946

2.091

1.299

F value (6.39)

4.09

3.28

1.43

1.56

Chlorpheniramine maleate^[b]

Mean

99.59

100.09

99.80

100.63

99.25

S.D.

0.75

1.02

2.23

1.26

1.28

Variance

0.56

2.04

4.96

1.59

1.65

N

5

5

5

5

5

Student’s t-test (2.306)

0.512

0.978

0.522

1.715

F value (6.39)

2.95

1.23

3.00

1.04