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Math Help - confidence interval/statistics

  1. #1
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    confidence interval/statistics

    Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of
    cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the unpopped
    kernels were counted. There were 86. (a) Construct a 90 percent confidence interval for the proportion
    of all kernels that would not pop. (b) Check the normality assumption. (c) Try the
    Very Quick

    Rule
    . Does it work well here? Why, or why not? (d) Why might this sample not be typical?

    Any help on how to solve this? I am at a total lost
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  2. #2
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    Quote Originally Posted by JorJasKi View Post
    Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of

    cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the unpopped
    kernels were counted. There were 86. (a) Construct a 90 percent confidence interval for the proportion
    of all kernels that would not pop. (b) Check the normality assumption. (c) Try the Very Quick
    Rule. Does it work well here? Why, or why not? (d) Why might this sample not be typical?

    Any help on how to solve this? I am at a total lost
    (a) There's an example you can follow here: http://www.mathhelpforum.com/math-he...-homework.html
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