Add paired t-test greater and less than comparisons

[Magnushhoie]

Add t-test_paired-gt and t-test_paired-ls to StatTest. Currently only the two-sided alternative of paired t-test is available, while e.g. Mann-Whitney provides all three.

Follows the same naming scheme and passes automated tests and manual testing.

[trevismd]

Hello @Magnushhoie ,
Thanks for the PR!
I guess it is convenient indeed to have these basic configurations included even though it is already possible to override the alternative parameter using stats_params.

Would you be willing to add basic tests ensuring their coverage in case something is updated later on (by us or scipy)?

[trevismd]

Could you move these below the two-sided counterpart and fix the alignment of the 2nd and 3rd lines?

[trevismd]

Suggested change

	IMPLEMENTED_TESTS = ['t-test_ind', 't-test_welch',
	't-test_paired', 't-test_paired-gt', 't-test_paired-ls',
	IMPLEMENTED_TESTS = ['t-test_ind', 't-test_welch',
	't-test_paired', 't-test_paired-gt', 't-test_paired-ls',

[trevismd]

Oh, and perhaps it's worth doing that for independent samples as well, then?

[Magnushhoie]

Hi Trevis,

Sure, tried to add some basic tests for matching p-values. I am struggling to figure out how the TestStatTest tests in tests/test_annotation.py are actually run. I hope the logic will work like it does when I coded it manually.