Measures of the central tendencies of variables such as the mean, median, and mode are examples of:

A. covariance.
B. descriptive statistics.
C. causal relationships
D. data mining.


Answer: B

Biology & Microbiology

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A.  proteins B.  nucleic acids C.  lipids D.  carbohydrates

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The reason that this insect can ‘skate’ across the water in a pond is _____

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