Table 9

Quantitative assessments of model adequacy.

Shapiro-Wilks normality test performed on standardized residuals.


W

P


Without outlier

0.984

0.06

With outlier

0.960

0.0001

T test to see if mean of standardized residuals was not zero.

Mean

T

df

P

Without outlier

-0.003

-0.03

158

0.97

With outlier

-0.003

-0.03

159

0.97

Bartlett's test to see if the standardized residuals, divided into four groups by their corresponding fitted values, lacked constant variances.

K2

Df

P

Without outlier

4.43

3

0.22

With outlier

15.02

3

0.002


Wachtel et al. BMC Cancer 2006 6:65   doi:10.1186/1471-2407-6-65

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