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6y
No, you don't need a certain percentage of the user base. You only need a random sample of a certain absolute size to get the margin of error within a certain limit.
No, you don't need a certain percentage of the user base. You only need a random sample of a certain absolute size to get the margin of error within a certain limit.
RE: Unreal, almost 20% of PayPal users used app to trade Bitcoin?