1. Statistical evaluation of biomedical studies
G.L. Pearce, D.D. Frisbie 
Osteoarthritis and Cartilage 
Volume 18, Pages S117-S122 (October 2010)
DOI: /j.joca
Copyright © 2010 Osteoarthritis Research Society International Terms and Conditions

2. Fig. 1 Flow chart for statistical procedures.
Osteoarthritis and Cartilage  , S117-S122DOI: ( /j.joca )
Copyright © 2010 Osteoarthritis Research Society International Terms and Conditions

3. Fig. 2
(A) Histogram showing the distribution of Total GAG (units; Shapiro–Wilk P-value=0.15) which is approximately normal. (B) Histogram showing the distribution of PGE2 (Shapiro–Wilk P-value<0.001) which does not fit the assumption of normality.
Osteoarthritis and Cartilage  , S117-S122DOI: ( /j.joca )
Copyright © 2010 Osteoarthritis Research Society International Terms and Conditions

4. Fig. 3
Scatter plot of Total GAG by PGE2. The correlation coefficient (r=0.06) and corresponding P-value (P=0.77) confirm that there is little or no association between the two variables.
Osteoarthritis and Cartilage  , S117-S122DOI: ( /j.joca )
Copyright © 2010 Osteoarthritis Research Society International Terms and Conditions