If You Are Calculating the Mean for Scores That Have

question 17

Multiple Choice

If you are calculating the mean for scores that have been arranged into a simple frequency distribution, what additional step has to be taken?

• A) ∑fX
• B) ∑f
• C) ∑cf
• D) ∑N

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Definitions:

Temporal Isolation

A mechanism of reproductive isolation where two species mate or flower at different times, preventing crossbreeding.

Reproductive Isolation

A set of mechanisms that prevent different species from interbreeding.

Ecological Isolation

A form of reproductive isolation where different species live in the same area but occupy different habitats, preventing them from mating and producing offspring.

Balanced Dimorphisms

The occurrence of two different forms or morphs of a species in the same population, maintained in a stable equilibrium through natural selection.