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To: MichCapCon

Okay, we have the mean. What are the median and mode? Averages can be skewed by one student missing nearly all the days and a bunch of students missing only a few.


8 posted on 11/06/2013 2:17:10 PM PST by IYAS9YAS (Has anyone seen my tagline? It was here yesterday. I seem to have misplaced it.)
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To: IYAS9YAS

Don’t confuse us with facts - we’re on a roll.


9 posted on 11/06/2013 2:19:24 PM PST by Veggie Todd (I don't always talk to Obama voters, but when I do I ask for Large Fries.)
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To: IYAS9YAS
Okay, we have the mean. What are the median and mode? Averages can be skewed by one student missing nearly all the days and a bunch of students missing only a few.

Good math thinking there, but it likely doesn't apply here. There are 66,000 students in Detroit schools, so it would take 15,000-plus missing half of the 180 school days to drag the absence average up to 46 days each for the other 45,000 kids with perfect attendance. Tripling the interquartile range (the difference in days missed for student #15,000 and student #45,000) makes it very unlikely that there are any statistical outliers... especially since we just showed that you would need 15,000 outliers to skew a perfect-attendance record for the other 45,000... so it is close to statistically impossible that there are enough statistical outliers to make the 46-day figure misleading.

22 posted on 11/06/2013 3:33:56 PM PST by Teacher317 (Obama is failing faster than I can lower my expectations.)
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