...again...
>Total Students in 72 Districts:...294,084 students
>Boston and Chelsea Students:...52,243 students
>Calculation...52,243/294,084 = 0.178
and a 17.8% sample size is considered "Excellent" for Statistical Purposes...moreover, the Absolute Number of subjects is also excellent (i.e. >1,000)
Be a Stand Up Guy, and just admit that you erred in failing to note the actual statistics involved in the NEJM study...