Answer:
be flexible, varying with subject matter, grade and objectives.
Explanation:
When we refer here for a scale we do not mean the geometry scale, rather it talks about some methods with which the statistics are measured.
Accordingly the answer shall be that the dimensions should be flexible, as in order to measure the data the scale shall also adjust according to the data and shall not be stringent.
Varying with subject matter, as when we compare the who drinks coffee more: male vs female the scale shall adjust accordingly, and when we do the measurement which city drinks more coffee, the scale shall be able to adjust accordingly depending upon the subject matter.
The scale shall be based on the objectives of the study and measurement, shall properly be based for the purpose of study.
