[RESOLVED] Denomination of non parametric tests

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by jantonie » Fri May 11, 2018 11:19 am

Hello,

With Jamovi, the One Sample T-Test (non parametric) is called ‘Mann-Whitney U’. The displayed statistic is a sum of ranks ($T^{+}$).

The Paired Samples T-Test (non-parametric) is called the ‘Wilcoxon rank’. The displayed statistic is a sum of ranks ($T^{+}$).

The Independent Samples T-Test (non-parametric) is called the ‘Mann-Whitney U’. The displayed statistic is a sum of comparisons that is calculated from a sum of ranks:

$$U_{1}= n_{1}\cdot n_{2}+ \frac{n_{1}(n_{1}+1)}{2} - T_{1}$$

For the sake of consistency, I suggest that the One Sample T-Test (non-parametric) would be renamed ‘Wilcoxon rank’.

Hoping that my remark is understandable, I send you my best regards.

Jantonie
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by jonathon » Fri May 11, 2018 10:23 pm

well this is a bit embarrassing.

you're quite right. i'm surprised this escaped our attention for so long.

will be fixed in the next version.

with thanks
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by jonathon » Tue May 15, 2018 9:33 pm

this is fixed in the 0.9.0.5

thanks for reporting.

jonathon
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