Which of the following best illustrates the conclusions that statisticians draw from experiments?
a. Y = 12X2 + 3X 7
b. The average of the sample is 12.4.
c. Male teenage delinquents show higher levels of testosterone on average than do male non-delinquents.
d. The Gross National Product increased 2 points last year.
Question 2
Inferential statistics are primarily concerned with
a. making inferences about a population from a sample.
b. describing what the data look like.
c. relationships rather than differences.
d. none of the above
Controlled Experiments Manipulate a Variable
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