AI and SAT percentiles

Test Preparation
1

<p>regarding this article:
<a href="http://thecrimson.com/article.aspx?ref=349217%5B/url%5D"&gt;http://thecrimson.com/article.aspx?ref=349217&lt;/a>
A little confusion herefor harvard:
Article:" Second, the median AI for all accepted recruited athletes must be within one standard deviation from the median for the class as a whole, which means that no more than half of accepted recruits can have an AI in the bottom 16 percent of the admitted class—not exactly the highest standard. But “the thinking,” says Fish, “is that if you put all that time into sports, there’s got to be some conscionable difference in your academics.”</p>

<p>First question is: Isn't one standard deviation 33 percent? can someone explain how 16 percent was obtained?</p>

<p>second question: what AI would this median be for harvard? Average AIs for IVYs i hear are around 210
Source:
<a href="http://hernandezcollegeconsulting.com/resources/calculator.html%5B/url%5D"&gt;http://hernandezcollegeconsulting.com/resources/calculator.html&lt;/a&gt;&lt;/p>

<p>If anyone can help, thank you</p>

<p>-mississippi matt</p>

2

<p>First answer: It's true that one standard deviation encompasses 33% of the data, but the median athlete AI has to be within one standard deviation from the median of the class as a whole, which should be at 50%. So the 33% of the data that is below the 50th percentile should be between 17% and 50% (50-33=17). </p>

<p>Second answer: Sorry, but I have no idea.</p>