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In a space of this size and complexity, exhaustive screening is impractical, conventional DoE has severe difficulties handling the multiple qualitative variables, and simple hill-climbing approaches tend to fail because of the interaction effects in the system.
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ANOVA was also used to compare qualitative variables for multiple layer quantitative analyses.
The Pearson (for quantitative and normally distributed variables) and Spearman (for qualitative variables) correlations and multiple linear regression models with genotypes and alleles were employed.
We performed basic descriptive analyses on all quantitative and qualitative variables and stepwise logistic and linear multiple regression analyses to isolate factors influencing sexuality and fatigue.
For the most extreme scenario considered here and when items were treated as qualitative variables (Table 4), the prevalence of hDS increased from 31.7% (multiple imputation assuming MAR data) to 36.4% (4.6% increase) when including the whole study population.
Group characteristic comparisons were performed using chi-squared tests for qualitative variables, and ANOVAs followed by Tukey's tests for quantitative variables, allowing multiple pair-wise comparisons.
Gender and marital status are qualitative variables.
So-called dummy variables are used to represent qualitative variables in regression analysis.
Categorical variables are called qualitative variables.
Qualitative variables are presented as number (percentage).
Qualitative variables are expressed as numbers (percentage).
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CEO of Professional Science Editing for Scientists @ prosciediting.com