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(Solved): In a random sample of 500 trick-or-treaters, 110 were zombles. Find the following, rounding answers ...
In a random sample of 500 trick-or-treaters, 110 were zombles. Find the following, rounding answers to decimal places. a. Find a point estimate for the population proportion of all trick-or-treaters who are zombies. b. Find a point estimate for the population proportion of all trick-or-treaters who are not zombies. c. Are all of the requirements satisfied to construct a confidence interval about ? Yes No d. Find a confidence interval for the population proportion of trick-or-treaters who are zombles. Answer as an interval Not possible to determine since at least some of the requirements are not satisfied. e. Find a 999 confidence interval for the population proportion of trick-or-treaters who are not rombies. Answer as an interval Not possible to determine since at least some of the requirements are not satisfied. f. Would it be reasonable to conclude that of all trick-or-treaters are zombies? Yes No Not applicable since at least some of the requirements are not satisfied.
Expert Answer
a. The point estimate for the population proportion of all trick-or-treaters who are zombies is the sample proportion, which is b. The point estimate for the population proportion of all trick-or-treaters who are not zombies is 1 minus the sample proportion, which is 0.78.c. The requirements to construct a confidence interval about p are:- Random sample: Yes, the sample is stated to be random.- Normal approximation: Yes, since the sample size is large enough , and the population proportion is not known to be extremely small or extremely large, the normal approximation is appropriate.