Which one of the following would we use in the denominator of the standard deviation formula when calculating the standard deviation of a population of test scores?
A. n ? 1
B. n + 1
C. N
D. N ?1
Ans: C
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Most experts agree that there is a combination of factors – both biological and social – that contribute to a child's ability to acquire language skills. The language-acquisition __________ is the social environment into which a baby is born,
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