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In a survey of a random sample of 25 households in the Cherry Creek neighborhood of...

In a survey of a random sample of 25 households in the Cherry Creek neighborhood of Denver, it was found that 9 households turned out the lights and pretended not to be home on Halloween.

a) Let p be the proportion of all households in Cherry Creek that pretend not to be home on Halloween. Find, a point estimate for p.

b) Compute a 85% confidence interval for p. What does a 85% confidence interval mean?

c) Check the assumptions necessary to calculate the confidence interval of part b).

Math   Statistics-And-Probability   
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