# Question

Refer to Examples 1 and 2 about the exit poll, for which the sample size was 3889. In that election, 40.9% voted for Whitman.

a. Define a binary random variable X taking values 0 and 1 that represents the vote for a particular voter (1 = vote for Whitman and 0 = another candidate). State its probability distribution, which is the same as the population distribution for X.

b. Find the mean and standard deviation of the sampling distribution of the proportion of the 3889 people in the sample who voted for Whitman.

a. Define a binary random variable X taking values 0 and 1 that represents the vote for a particular voter (1 = vote for Whitman and 0 = another candidate). State its probability distribution, which is the same as the population distribution for X.

b. Find the mean and standard deviation of the sampling distribution of the proportion of the 3889 people in the sample who voted for Whitman.

## Answer to relevant Questions

Part b of Example 7 used the central limit theorem to approximate the probability of coming out ahead if you bet $10 on red on each of 40 different roulette wheel spins. For each spin, the winnings are $10 with probability ...Refer to the previous exercise. a. In part b, if the sampling distribution of the sample proportion had mean 0.409 and the standard deviation 0.008, give an interval of values within which the sample proportion will almost ...Using data from the National Survey of Families and Households, a study (from S. South and G. Spitze, American Sociological Review, vol. 59, 1994, pp. 327–347) reported the descriptive statistics in the following table for ...For many years, the General Social Survey has asked respondents whether they favor the death penalty for persons convicted of murder. Support has been quite high in the United States, one of few Western nations that ...Refer to the previous exercise. Show how you can get a 95% confidence interval for the proportion of American adults who were opposed to the death penalty from the confidence interval stated in the previous exercise for the ...Post your question

0