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Biting an un-popped 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 un-popped 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?
A. Try the Very Quick Rule. Does it work well here? Why, or why not?
B. Why might this sample not be typical?
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At 0.01 level of significance, is there evidence that mean price is higher at Whole Foods Market than at Fairyway supermarket? Interpret the meaning of p-value in (i).
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If a complete failure occurs, calculate the probability that the fault occurred in:
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Give all steps of a test of the hypothesis that the corresponding population proportions are equal.
Suppose it costs $25 per student for the administrators to provide the course materials.
At α = 0.01 level of significance, test the hypothesis that these data can be described by a Poisson pdf.
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