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16 February, 10:34

Joey received a report that he scored in the 98th percentile on a national standarized reading test but in the 78th percentile on the math portion of the test. Explain to Joey's grandmother, who knows no statistics, what these numbers mean.

Answers:

A. Joey scored worse than 2% of all students who took the reading test and he scored as well as or better than 78% of all students who took the math test.

B. Joey scored worse than 98% of all students who took the reading test and he scored as well as or better than 22% of all students who took the math test.

C. Joey scored worse than 2% of all students who took the reading test and he scored as well as or better than 22% of all students who took the math test.

D. Joey scored worse than 98% of all students who took the reading test and he scored as well as or better than 78% of all students who took the math test.

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  1. 16 February, 10:48
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    A given score in a given percentile means that percentage of scores was below the given score. The appropriate choice is ...

    ... A. Joey scored worse than 2% of all students who took the reading test and he scored as well as or better than 78% of all students who took the math test
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