[RESOLVED] Denomination of non parametric tests

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[RESOLVED] Denomination of non parametric tests

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
jantonie

Posts: 18
Joined: Tue Oct 17, 2017 11:58 am

Re: Denomination of non parametric tests

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

jonathon

Posts: 1465
Joined: Fri Jan 27, 2017 10:04 am

Re: Denomination of non parametric tests

this is fixed in the 0.9.0.5

thanks for reporting.

jonathon

jonathon

Posts: 1465
Joined: Fri Jan 27, 2017 10:04 am