Statistical Aid: A School of Statistics
Learn Statistics and Data Analysis Intuitively!
The Wilcoxon signed rank test determine whether the median of the sample is equal to some specified value. It utilizes both the sign of the difference as well as the magnitude of the differences, hence it provides more information than the sign test, it is often more powerful non-parametric test. The Wilcoxon Signed-Rank Test is a … Read more
In many situation, we are interested to whether the data collected for statistical analysis is random or not. In most all statistical inference we assume that the data is in a random sample. If the randomness of a sample is suspected, we test it’s randomness before, going to statistical analysis. In detail, There are many … Read more
The sign test is the oldest of all non-parametric tests. and it is so called as usually covert the data for analysis to a series of plus and minus sign. The test statistic consists of either the number of plus sign or the number of minus sign. According to wikipedia, “The sign test is a statistical … Read more
Statistical analysis plays a crucial role in data interpretation across various fields. While parametric tests are widely used, non-parametric tests provide a robust alternative when data assumptions are not met. In statistics, Non-parametric tests test which does not make any assumption as to the form of distribution in the population from which the sample is drawn … Read more
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