Reply to How common is a math or reading MAP score at the 99th percentile in this area?

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Reply to "How common is a math or reading MAP score at the 99th percentile in this area?"

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[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous]Uhhhhhhh 99th percentile (99.0) = 1 per 100. There are ~150,000 students in MCPS. If we were exactly like the nation as a whole, we'd have 1500 kids in the 99th. If our 98th is like the 99th nationally, we'd have 3000. And then, DCUM skews whiter and wealthier than most places online, and those kids, for a variety of reasons, tend to score higher. And then there's going to be a strong self-selection bias for a thread titled "How common is a math or reading MAP score at the 99th percentile in this area?"

I never understand why people think folks are lying or trolling. They could be? But it's easily possible that 10 people on DCUM have kids in the 99th percentile. [/quote]

I'm guessing you're not a math or engineering major... 150K students are spread out across 12 Grades (not counting K..).

Using your figure of 3000, thats about 250 per grade level spread out across all schools.

Using TPMS as the example, that seems just about right, I would think.  In 2019, about half-ish were picked up by TPMS, another (fifth'ish)? by Eastern, another set spread out amongst the CES programs, etc.[/quote]m

And I'm guessing you weren't a literature major, because your reading comprehension could use a lot of work. I understand the commenters here may have kids more concentrated in, say, 2nd-7th grades. So let's say 1500. But this is a general discussion, not "how common is it to have a 3rd grader score in the 99th?" See the OP to which people were responding. So ~250 per grade may be accurate, but... so? If parents of kids in every grade or many grades are likely to comment, then that's well more than 250.

I'm not sure what correction you thought you were making to my rather simple point. To wit-- there's no reason there couldn't be 10 honest commenters in this thread whose kids really have scored in the 99th percentile on at least a few of their standardized tests. Someone COULD be lying, but given the math and the context, it's eminently possible that no one is. That's what o was responding to-- the accusation that those commenters must be lying because "What are the odds?!"

In actuality, the odds are decent and my math is fine. Have a blessed day. [/quote]
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This is kind of moot now. The pool for magnet admission was made up of students at 85% or higher. THey were picked randomly. Since these scores fall on a bell curve, most of next years magnet students will be in the 85%-90% range. One-fifteenth of those admitted would be 99% if it were linear but since it's a bell curve figure a lot less. So figure less than 6 magnet students from next year's rising magnet students would be in the 99% at TPMS.[/quote]

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