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Confidence interval for the population proportion

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Collect 50 or more qualitative data items.Then, construct a 90% confidence interval for the population proportion, p.

Examples of qualitative data are hair color, human blood type, gender, nationality, and hurricane category.

Then, answer the following:

  • Write down your sample size.
  • From your data, what is the point estimate, p^ of the population proportion?
  • Write down the confidence interval that you obtained. Interpret the result.
  • What is the margin of error?

Using the same data, construct a 98% confidence interval for the population proportion. Then, answer the following three questions:

  • What happens to the length of the interval as the confidence level is increased?
  • How has the margin of error changed?
  • If the sample size is increased, what do you think will happen to the margin of error? Why?

Reference no: EM131533539

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