Exact(6)
Firstly, the 33 outcomes' baseline assessments were compared via paired t test (since Kolmogorov Smirnov testing confirmed normality) for any group baseline difference.
* Petrobras says it "confirmed normality of operations".
We confirmed normality assumption through the Shapiro Wilk test.
We confirmed normality of both the LF and HF components of HRV.
The Shapiro-Wilk test confirmed normality of the untransformed DAS28 score across distribution of the modeled covariates.
Data screening involving the calculation of skewness and kurtosis z-scores, Kolmogorov-Smirnov test and Shapiro-Wilk test confirmed normality of the data.
Similar(54)
Graphical diagnostics in R were used to confirm normality of errors (normal-probability plots) and homogeneity of variances (fitted values vs. residuals plots).
In addition, the data were plotted using "Q-Q plot" to visually confirm normality.
Non-parametric testing was utilized where sample sizes were insufficient to confirm normality of data distribution.
t tests were performed using Microsoft Excel after confirming normality using SPSS software.
However, Kolmogorov-Smirnov and Lilliefors tests were used to confirm normality of continuous data.
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