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vaccinated for flu, or whatever. Having a little knowledge of statistics, the superintendent
would know that it is unnecessary and inefficient to question each child; the proportion
for the entire district could be estimated fairly accurately from a sample of as few as l00
children. Thus, the purpose of inferential statistics is to predict or estimate characteristics
of a population from a knowledge of the characteristics of only a sample of the population.
21. With what is the passage mainly concerned ?
(A) The drawbacks of descriptive and inferential statistics
(B) Applications of inferential statistics
(C) The development and use of statistics
(D) How to use descriptive statistics
22. The word "divergent" in line 1 is closest in meaning to
(A) different
(B) distributed
(C) recorded
(D) prominent
23. According to the first paragraph, counting and census-taking arc associated with
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