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Table 4 Normality test for 260/280 ratio, 260/230 ratio and RNA weight data.

From: Improved CTAB method for RNA extraction of thick waxy leaf tissues from sago palm (Metroxylon sagu Rottb.)

Tests of normality

 

Kolmogorov–Smirnova

Shapiro–Wilk

Statistic

df

Sig

Statistic

df

Sig

260/280

0.210

6

0.200*

0.859

6

0.185

260/230

0.219

6

0.200*

0.862

6

0.195

Weight

0.373

6

0.009

0.689

6

0.005

  1. The p-values of 260/280 ratio and 260/230 ratio data are higher than α (0.05) value hence they are normally distributed while RNA weight data p-value is lower than α (0.05) value hence not normally distributed with 95% confidence
  2. *This is a lower bound of the true significance
  3. aLilliefors significance correction