A satisfactory statistical quantitative method should not possess which one of the following qualities?

A satisfactory statistical quantitative method should not possess undue flexibility, which breeds inconsistency.

Appropriateness ensures the method suits the data and the research question.

Measurability lets the phenomenon be expressed in numerical terms reliably.

Comparability allows results to be set against other studies or standards.

Undue flexibility lets the same data yield different outcomes, weakening rigour.

A sound method also demands objectivity and stability across repeated use.