Question 720799
Joey received a report that he scored in the 97th percentile on a national standardized math test but in the 72nd percentile on the reading portion of the test.
What do these numbers mean?
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95th %ile means Joey's national test is better than 97% other who took the test.
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72%ile mean his math test results are better than 72% others who took the test.
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 Can we determine Joey's z-scores for his math and reading performances?
 Why or why not?
Yes
The z-score for 97%ile is invNorm(0.97) = 1.8808
The z-score fo 72%ile is invNomr(0.72) = 0.5828

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Cheers,
Stan H.