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Biting the unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in the popper. After popping, the unpopped kernels were counted. There were 86.

a) Develop a 90 percent confidence interval for proportion of all kernels that would not pop.

b) Check normality assumption.

c) Try the Very Quick Rule. Does it work well here? Why, or why not?

d) Why may this sample not be typical?

Statistics and Probability, Statistics

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