If we have a 90% confidence interval, then the probability of error is 10% in total but could be greater than our interval maximum l or smaller than our interval minimum - we allow 5% error in either direction

(notice we can also write our intervals as 10 plus or minus 1.7 , for instance - indicating it could be more or less than our estimate of the mean)

Apr 3rd, 2015

Any questions , please fire away - I am waiting

Apr 3rd, 2015

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