You work out a proportion (two tail C.I. alpha =.05) for folks liking chocklet i

Question

You work out a proportion (two tail C.I. alpha =.05) for folks liking chocklet ice-cream. Your sample size was n=200 folks. With liking chocolate ice-cream was determined to be from a study to be P(s) =.75 Your final confidence interval works out to be 750 +/- 060 In class, we mentioned that some books and instructors want students to show this of people +/- M.E.(as people) but the formula look strange as you cannot easily effect of the central limit theorem (i.e. the division by sqrt(n) is really there but somewhat hidden'm the calculation.) But there is a very easy way to convert this into a number of people confidence interval. The # people liking chocolate ice-cream +/- the M.E. in people. Write this result: The number of folks in this study that like chocolate ice cream +/- M.E. in people. Note this is a very easy problem

Explanation / Answer

SE = sqrt(p*(1-p)/n) =0.06

so p(1-p)=0.72

There are no positive roots for this equation.(since p is probability, it needs to be positive)

So, this distribution is not possible at all.

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