Whenever the distribution of differences is normally shaped, and all its

assumptions are met, then

a. the samples must represent different populations
b. the samples must represent a single population
c. more than two populations must be involved
d. none of these, since when its assumptions are met, the distribution of
differences is always assumed to be normally shaped

d

Psychology

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Two kinds of changes take place in the body in response to increased sex hormones during puberty. What characteristic is directly related to reproduction?

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