Quote:
Originally Posted by tedzan
39 = PIEDMONT 150 (off-center) ...................... 39/45 = 87 %
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Even based on your relatively low sample size (45), it is reasonable (95% confidence rate) that 87% (plus or minus 10%) of all P150 Green Cobbs are off-center.
I used the
confidence interval calculator and assumed a population of 10K P150 Green Cobbs (note that the value doesn't change even if I go up to 100K).