(At least that's what I learned last quarter in intro statistics. Feel free to correct me if I missed anything)
*Though if the sample is drawn without replacement (i.e. putting each subject back in the pool before choosing the next), the sample should be under 10% of the population.
What also annoys me a lot is the lack of variety in ads, if I open three tabs on Youtube, chances are they will all play the very same commercial and often one that I already have seen five times before the same day.
This really bugs me. I'll be listening to Pandora and they'll cycle between just 2 or 3 ads. Do they think that repeating ads is going to make them more effective? Maybe to a degree, but it starts to get really annoying to listen to the same crap over and over again (same goes for the music, but that's a different rant).
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No, he/she said statistics is a requirement for the psychology students, of which they have a lot.
In response to the rest of your post, I don't really think of CS being in the same category as math, physics, etc. It just doesn't seem as "science-y" to me.... Though I'm just a student barely starting his CS degree, so what do I know eh.