Solution Found!
Refer to Exercise 8.59. How many tweens should have been interviewed in order to
Chapter 8, Problem 8.73(choose chapter or problem)
Refer to Exercise 8.59. How many tweens should have been interviewed in order to estimate the proportion of tweens who understand and enjoy ads that are silly in nature, correct to within .02, with probability .99? Use the proportion from the previous sample in approximating the standard error of the estimate.
Questions & Answers
QUESTION:
Refer to Exercise 8.59. How many tweens should have been interviewed in order to estimate the proportion of tweens who understand and enjoy ads that are silly in nature, correct to within .02, with probability .99? Use the proportion from the previous sample in approximating the standard error of the estimate.
ANSWER:Step 1 of 2
We will use following:
Let has binomial distribution with parameters and . Then confidence interval for is defined by:
where is estimate for probability .
Let is estimate for unknown parameter for distribution from which we observe some sample. Bound of error of this estimation is defined by:
bound of error = critical value standard deviation.