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Non-parametric statistical tests were used, as normality of data was not ensured: χ2 tests compared the numbers of animals performing stereotypies between groups.
Non-parametric statistical tests were used, as normality of data was not ensured: χ2 tests compared the numbers of animals performing given behavioural patterns between groups.
To compare means the Mann-Whitney U test was used as normality could not be assumed.
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For two continuous variables Pearson Correlation was used, as long as both satisfied normality criteria.
Shapiro Wilk test was used as the normality test.
Data were presented in this manner in order to compare with other published HRQOL studies, however, non-parametric Wilcoxon signed rank tests were used as assumptions of normality were not fulfilled.
In this study, the results from the normal subjects were used as the reference for normality in each of the directions.
The respective normal distribution values, often used as cut-off for normality (i.e. 1 and 1.5 s.d.
Mann-Whitney nonparametric tests were used, as determined by the normality of distribution variables.
Nonparametric tests were used as appropriate where the normality assumptions could not be met.
Also, the healthy reference group was studied by four authors of these articles (Teresa Cañas, Araceli Maciá, Teresa Fontanilla, and María Miralles) in another hospital, though with the same device and convex probe and including children of all ages, so the authors think that those values can still be used as a reference of normality in this study.
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CEO of Professional Science Editing for Scientists @ prosciediting.com