Suppose that 60 percent of voters in a particlular region support a candidate. Find the probability...
Suppose that 60 percent of the voters in a particular region support a candidate. Find the probability that a sample of 1,000 voters would yield a sample proportion in favor of the candidate within 4 percentage points of the actual proportion. .0155 .9484 .9952 .9902
Suppose that 80 percent of the voters in a particular region support a candidate. Find the probability that a sample of 1600 voters would yield a sample proportion in favor of the candidate within 1 percentage points of the actual proportion.
Suppose we conduct a poll to estimate the proportion of voters who favor a major presidential candidate. Assuming that 50 percent of the electorate could be in favor of the candidate, determine the sample size needed so that we are 95 percent confident that pˆ , the sample proportion of voters who favor the candidate, is within a margin of error of .01 of p, the population proportion of all voters who are in favor of the candidate. n =...
Essay type Questions Chapter 8 1. Packages of sugar bags for Sweeter Sugar Inc. have an average weight of 16 ounces and a standard deviation of 0.24 ounces. The weights of the sugar bags are normally distributed. What is the probability that 16 randomly selected packages will have an average weight less than 15.97 ounces? 2. The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.0 inches and a standard deviation of 0.98 inches....
Suppose that of all voters in Florida, 40% (p=.4) are in favorite of candidate Brown for Governor. Pollsters take a sample of 2400 voters. What proportion of the sample would be expected to favor candidate Brown? (show your work)
Suppose the true proportion of voters in the county who support a specific candidate is 0.45. Consider the sampling distribution for the proportion of supporters with sample size n = 159. What is the mean of this distribution? What is the standard deviation of this distribution?
In a random sample of 100 eligible voters, 85 preferred candidate A over candidate B. Find a 99 percent confidence interval for the proportion p of voters favoring candidate A.
Suppose you wish to know the proportion of registered voters in CA who support a particular ballot measure. Further suppose that some initial estimates indicate that the proportion of registered voters who support the measure is approximately 0.58. Determine the sample size required to estimate the true proportion if you want to be 98% confident that your estimate of the proportion is within 0.02 (two percentage points). You need to sample _____ registered voters in order to be 98% confident...
A candidate for public office is thought to have support from 65% of the voters. A random sample of six voters is taken. What is the probability that there will be at least four who support the candidate?
Suppose that 35% of all voters prefer Candidate A. If 4 people are chosen at random for a poll, what is the probability that exactly 3 of them favor Candidate A?