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Published on 02-21-2010 03:48 PM
There were a number of misperceptions and misstatements about NSS that warrant correction. First, you need to understand what NSS is.
NSS creates a standard bell curve from grade data of the last 6 months of completers from your squadron. If you know some statistics, it is called a T-score. 50 is ALWAYS average. 1.5 standard deviations from 50 is 35 and 65, which encompasses about 88% of everyone that completes. About 6% of the completers will have an NSS below 35. About 2% will have an NSS below 30. Theoretically, you could have someone below 20 or above 80, but that would statistically only be 0.1% each. So, 1 in 1000 will be below 20 or above 80.
So, NSS is simply a ranking of students in a specific population. It is NOT a measure of the performance of those students. To illustrate, if you had 100 Chuck Yeagers ranked against each other, 6-7 would have an NSS below 35, 6-7 would have an NSS above 65.
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OnTopTime on 03-03-2010