math6

Interpreting Survey Results

When the results of a survey or poll are published, the sample size and the margin of error should both be given. For example: 1,000 voters were surveyed, and 39% ± 2% of the voters agree with the president. In this example, N = 1,000, and the margin of error (MoE) is 2%.

The  Polling Report  website lists several public opinion polls. Search the site and find a poll where the sample size and margin of error are given. Try to find a poll dealing with a topic in your profession or one in which you are interested.

Main Post:

Determine the following information for the selected poll results from  Polling Report  and include your answers in your initial post.

1. List the URL for the website where the poll results were listed.

2. State the poll question, the sample size  n, and the margin of error (also known as sampling error or MoE) for the data.

3. State the confidence interval for the selected poll question  using the MoE. What does this confidence interval estimate?

4. Use the  Confidence Interval template  to calculate the confidence interval based on the sample size and the number of successes (the proportion you are interested in). Use a 95% level of confidence.

5. State the following:

· What is the  calculated confidence interval?

· How does this compare to the interval in #3 from the poll's margin of error?

6. Discuss potential biases that could skew sampling results.

7. Interpret the results of the poll selected using your own words and complete sentences.  Note: Depending on the question asked, the poll may have more than one poll result — you only need to discuss one result.