recurring problem I'm encountering re: average bus ridership is the drastic fluctuations you get--it's hard to be sure if there's an error in the data collection, in my processing it, or if ridership really just varies that much; all are plausible explanations
I'm about 80% sure that the problem isn't in my processing--I'm neurotic enough about it that I usually catch my mistakes, but I've screwed up once or twice in the past, so u never know
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The data collection (automatic passenger counts) is known to have problems with consistency and accuracy but still prob better than trying to estimate from a sample of in-person counts (especially if the variance is really as high as it looks!)
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So, out of all options, I'm *most* sure that it really just varies this much.
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