I have noticed that many picture stealer will start posting their ads around 9:00 pm. The well known cash and dash around 10:00 pm and later. Not all who post late can be lumped into the category. If you want to do something late best to use a provider who has reviews.
I have noticed the good BP providers only post 1 or 2 pictures a day.
From Oct 3 to Sept 28, there were around 600 ads in Baltimore maryland area so even this sample is just specific to that time frame and specific region.
He'd need a larger sample size to cover other cities before he can start generalizing. Accuracy also depends on the percentage of your sample that behaves in a particular way. Unless of course we want a lower confidence level below 95% at a larger interval above a 10% which would then decrease the accuracy of the representative sample below 85%. Of course a level of 85% isn't so bad, per say, but the given level of accuracy we must use the worst case percentage to determine the sample size... The confidence interval calculations also tend to assume you have a truly genuine random sample of the relevant population as the intervals then become unreliable and would force you to re-evaluate the sampling procedure...
Sumdrunkasianguy's post was hilarious. I was trying to come up with a way to express the same sentiment, but I dropped out of my intro to statistics course...
Thanks, HoundDog, for the observation! And keep them coming!
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