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the practice or science of collecting

and analyzing numerical data in large

quantities, especially for the purpose

of concluding proportions in a whole

from those in a representative

sample.

Entire collection of a

defined groups

a part of population

It is any observation of a

physical or behavioral

characteristics that can

take on different values.

Changed and controlled in an experiment

Variable being tested and measured in an experiment.

simplest form of measurement, for

classification and categorization.

Rank ordering of measurement.

no absolute zero point.

scale that has true or absolute zero point.