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question
a biologist samples and measures the length of the fish in a lake. what is the level of measurement of the data?
select the correct answer below:
nominal
ordinal
interval
ratio

Explanation:

Ratio measurement has a true zero point, allows meaningful comparisons of magnitudes, and supports all arithmetic operations including multiplication/division. Fish length has a true zero (a length of 0 means no fish length), and we can meaningfully say one fish is twice as long as another, which fits ratio level.

Answer:

ratio