The corresponding percentile of each scaled score varies from test to test—for example, in 2003, a scaled score of 800 in both sections of the SAT Reasoning Test corresponded to a percentile of , while a scaled score of 800 in the SAT Physics Test corresponded to the 94th percentile. The differences in what scores mean with regard to percentiles are due to the content of the exam and the caliber of students choosing to take each exam. Subject Tests are subject to intensive study (often in the form of an AP , which is relatively more difficult), and only those who know they will perform well tend to take these tests, creating a skewed distribution of scores.
A special situation exists when a subject seems not to agree with its predicate. For instance, when we want each student to see his or her counselor (and each student is assigned to only one counselor), but we want to avoid that "his or her" construction by pluralizing, do we say "Students must see their counselors " or "Students must see their counselor "? The singular counselor is necesssary to avoid the implication that students have more than one counselor apiece. Do we say "Many sons dislike their father or fathers "? We don't mean to suggest that the sons have more than one father, so we use the singular father. Theodore Bernstein, in Dos, Don'ts and Maybes of English Usage , says that "Idiomatically the noun applying to more than one person remains in the singular when (a) it represents a quality or thing possessed in common ("The audience's curiosity was aroused"); or (b) it is an abstraction ("The judges applied their reason to the problem"), or (c) it is a figurative word ("All ten children had a sweet tooth ") (203). Sometimes good sense will have to guide you. We might want to say "Puzzled, the children scratched their head" to avoid the image of multi-headed children, but "The audience rose to their foot" is plainly ridiculous and about to tip over.
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