Non-Parametric Tests in Excel
Use non-parametric tests when data is:
- Counts or frequencies of different types
- Measured on nominal or ordinal scale
- Not meeting assumptions of a normal test
- Distribution is unknown
- A small sample
- Imprecise
- Skewed data that make the median more representative
Note: Excel doesn't have the ability to do statistical tests of non-normal (i.e., not "bell shaped") data. QI Macros, however, have a set of templates to handle non-parametric data.
Samples | |||
Variable (Continuous) Data | 1 | 2 | 3 |
Independent | |||
Dependent | Spearman | ||
Goodness of Fit | Kolmogorov-Smirnov (K-S) | Tukey | |
Attribute (Ordinal Data | |||
Independent | 1-Sample Sign Test | Sign Test | |
Dependent | Spearman |
Non-Normal vs Normal Tests |
|
Non-parametric | Parametric (Normal) |
1-Sample Sign | 1-Sample z-Test 1-Sample t-Test |
Sign Test | Paired Two-Sample t-Test |
Wilcoxon Signed Rank Test | |
Mann-Whitney Wilcoxon Rank Sum Test |
2-Sample t-Test |
Kruskal-Wallis | one-way ANOVA |
Mood's Median Test | one-way ANOVA |
Friedman | 2-way ANOVA Test |
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