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[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous] [quote]

That would not be as easy to calculate as you think. [b]Only 75% of the students at RM actually took the SAT.[/b] Only median numbers are reported for SAT scores among magnets, whereas the aggregate school data is reported as "average"--I could not find out whether this is median or mean. Very little data is given about the standard deviation or the distribution. You can create whatever array of possible scenarios that would fit these data.[/quote]

Good data point - that 75% includes magnet kids. Assuming 100% magnet kids took the SAT, that means only about 50% of non magnet kids took the SAT, right?  [/quote]

478 seniors. The 2016 class had 114 enrolled students, though perhaps some left the program. Lets round it to 110. Then we have

0.75 * 478 = 359 students took the SAT
110 magnet students took the exam
359 - 110 = 249 non-magnets took the exam
478 - 110 = 368 total non-magnets in the 2016 class
249 / 368 = 67.7% of non-magnet students took the exam.[/quote]

interesting analysis... it made me look up. according to the report below, the number is 387 (pretty close to your 359 number, page 8 of the report), page 10 shows mean score of 1779.

http://www.montgomeryschoolsmd.org/info/pdf/160929%20SAT%20Exam%20Participation%20Perform.pdf

also according to the IB profile (as pp suggested), RMIB mean SAT score is 2240 (http://www.montgomeryschoolsmd.org/uploadedFiles/schools/rmhs/ib/IB%202015-16%20Profile.pdf)

which means non-IB kids' mean score is 1596, which according to page 10 of the report, slightly below MCPS avg but not by far. I think almost 650 difference between magnet and non-magnet is crazy.

[/quote]
But you are also forgetting that a significant number of the RMIB magnet kids are inbound RM cluster kids. So, if RM didn't have the IB, the mean SAT score for that student body would be higher than MCPS average.   [/quote]

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