document.write( "Question 635031: The average math SAT score is 516 with a standard deviation of 117. A particular high school claims that its students have unusually high math SAT scores. A random sample of 45 students from this school was selected, and the mean math score was 549. Is the high school justified in its claim? Explain.\r
\n" ); document.write( "\n" ); document.write( "Yes or No, because the z-score (??) is usual or unusual since it lies or does not lie within the range of a usual event, namely within 1, 2 or 3 deviation(s).\r
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Algebra.Com's Answer #400098 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "average math SAT score is 516 with a standard deviation of 117.
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document.write( "Sample of 45 with mean math score of 549
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document.write( "z-score is easy enough.  One tailed test
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document.write( " z = 
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document.write( "For a Sample group of size 45, generally an acceptable critcal area is z ≥ 1.68 (using One-tailed test)
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document.write( "That being the case, a z-score of 1.892 would be unusual as is 1.892 > 1.68 \n" );
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