Yossarian wrote:Is zero an invented number? Is zero a number? Is zero? Is?
SpaceGazelle wrote:Complex numbers are no more invented than negative numbers.
davyK wrote:I was amazed to hear about complex numbers being able to solve real world problems.
SpaceGazelle wrote:An electron for example is nothing more than a set of equations
Andy wrote:Ignoring the maths, you’re not going to be able to accurately interpret any of your results.
voices wrote:I'm not 100% sure what the question is, but addressing the easy "what's the probability 12 people get menu A" - it's a simple binomial calculation: 40C12 x 0.3^12 x 0.7^28 = 13.66% - assuming that the distribution of both the menus and the questionnaires was random If you want confidence intervals you can use the general properties of the binomial distribution. The variance of the binomial distribution is N x P x (1-P) So 40 x 0.3 x 0.7 = 8.4 in this case. A 95% probability confidence interval would then broadly be 1.96 x 8.4^0.5 plus or minus the mean, which is something like 6 to 17. There's all sorts of things you can do with this, but the questions a bit vague so I'm not sure what else you want doing. I'm not going to start getting into censoring and extracting information involving peoples views on either menu because I'd have to actually think about that!
voices wrote:...A 95% probability confidence interval would then broadly be 1.96 x 8.4^0.5 plus or minus the mean, which is something like 6 to 17...
The Daddy wrote:Cool, I’ll give that a read later. Here’s a good one about graphs:
https://www.newyorker.com/magazine/2021/06/21/when-graphs-are-a-matter-of-life-and-death
RamSteelwood wrote:does it being random mean each draw is a completely fresh chance?
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