Parametric tests make assumptions that aspects of the data follow some sort of theoretical probability distribution. Non-parametric tests or distribution free methods do not, and are used when the ...
The Student's t statistic assumes that the data are approximately normally distributed. The sign test and signed rank test are nonparametric tests. The signed rank test requires a symmetric ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback