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12 November, 14:39

Professor Tan studies water quality in streams near chemical plants. Which is a type of qualitative data that Professor Tan should record during these studies?

A) the pH of the water

B) any occurrences of unusual odors

C) the oxygen concentration of the water

D) any changes in sizes of fish population

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  1. 12 November, 15:09
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    The correct answer is B) any occurrences of unusual odors.

    A qualitative data is something that is not described by numbers. The pH of water, oxygen concentration, and changed in the size of fishes can all be described by a number.

    Only the occurrences of usual odors cannot be described by a number.
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