Determination of Coverage Interval of Antioxidant Vitamins (Vitamin C & Vitamin E) in Plasma and Serum of Bengali Population

Table 3

Distribution of Reference Values of α-tocopherol.

Number of observations (𝑛)	71
Distribution of reference values (mg/L)
Mean	6.35
Median	5.99
95% CI (confidence interval)	6.35±0.54
Test for normal distribution
Kolmogorov Smirnov^a test. 𝑃	0.037^#
Non parametric Coverage interval	3.3–13.3 mg/L
Kolmogorov Smirnov test after; logarithmic transformation. 𝑃	0.200*
Parametric coverage interval	3–11.9 mg/L

#The distribution is not in normal distribution as 𝑃<0.05.
∗This is a lower bound true significance 𝑃>0.05.
aRefers to in statistics, the Lilliefors test.