Am Montag, dem 15.06.2026 um 10:40 -0400 schrieb Cottrell, Allin:
On Mon, Jun 15, 2026 at 7:41 AM Artur T. <artur.tarassow@gmail.com> wrote:

Hi all,

The "meantest" command provides a simple way to conduct a paired t-test comparing the mean values between TWO series.

The help says:
"""
Paired test
In the primary case (only) the --⁠paired option can be given, to test the null hypothesis that the mean difference between the paired values of the two series arguments is zero. Otherwise, pairing is not assumed.
"""

Take the following example which I would expect to fail as only a single series is provided:

<hansl>
open mrw --quiet
summary gdpgrow --simple
meantest gdpgrow --paired
</>

Yes, that should fail, and now it does in git. The paired case
requires two series (and is incompatible with --split-by).

Allin

Confirmed. Thanks for the quick fix, Allin!

Artur