Estimate the proportion of p registered voters

Assignment Help Business Management

Reference no: EM131021421

National public opinion polls are often based on as few as 1,500 persons in a random sampling of public sentiment toward issues of public interest. These surveys are often done in person, because the response rate for a mailed survey is very low and telephone interviews tend to reach a larger proportion of older persons than would be represented in the public as a whole. Suppose a random sample of 1,500 registered voters were asked for their opinion on energy issues.

a. If 230 of the 1,500 responded that they would favor drilling for oil in national parks, estimate the proportion of π registered voters who would favor drilling for oil in national parks. Use a 95% confidence interval.

b. How many persons must the survey include to have 95% confidence that the sample proportion is within .01 of π?

c. Acongressman has claimed that over half of all registered voters would support drilling in national parks. Use the survey data to evaluate the congressman's claim. Use a = .05

Reference no: EM131021421

Questions Cloud

Find the equation that relates c and x : Projections are that 100 items will cost $10,000 to produce and that 300 items will cost $22,000 to produce. Find the equation that relates C and x.

Explain why marginal social cost curve has a different slope : The following graph illustrates the situation in the dry cleaning market assuming that the marginal social cost of the pollution increases as the quantity of items cleaned per week increases. The graph includes two demand curves: one for a smaller..

The following concept is associated with the deming wheel : Which of the following factors account for the interest in organizational management?

Advertisement for a client bank : The media selection manager for an advertising agency inserts the same advertisement for a client bank in two magazines, similarly placed in each.

Estimate the proportion of p registered voters : If 230 of the 1,500 responded that they would favor drilling for oil in national parks, estimate the proportion of π registered voters who would favor drilling for oil in national parks. Use a 95% confidence interval.

Is there an economically efficient amount of crime : A few years ago, Governor Deval Patrick of Massachusetts proposed that criminals would have to pay a "safety fee" to the government. The size of the fee would be based on the seriousness of the crime (that is, the fee would be larger for more ser..

Conducting a statistical test of research : Would it be appropriate to use a normal approximation in conducting a statistical test of the research hypothesis that over half of persons suffering from chronic pain are over 50 years of age?

What does finklestein mean by the mortality effect : What does Finklestein mean by the "mortality effect"? Why would the mortality effect of obesity being smaller than the mortality effect of smoking result in obesity having a larger external cost?

Confidence interval for proportion of new product : Assuming that the 500 calls represent a random sample, find a 90% confidence interval for the proportion of new product placements for all automobile parts stores.

User Account

All Pages