Ask Question

You collect a random sample of size n from a population and calculate a 90% confidence interval. Which of the following strategies would produce a new confidence interval with an increased margin of error? Use an 80% confidence level. Use the same confidence level, but compute the interval n times. Approximately 10% of these intervals will be larger. Use an 85% confidence level. Decrease the sample size. Nothing can guarantee that you will obtain a larger margin of error. You can only say that the chance of obtaining a larger interval is 0.10.

+2
Answers (1)
  1. 3 June, 22:35
    0
    Decrease the sample size.

    Step-by-step explanation:

    Margin of error is:

    ME = CV * √ (σ / n)

    where σ is the population standard deviation, or:

    ME = CV * √ (p (1 - p) / n)

    where p is the proportion.

    In each case, the margin of error is directly proportional to the critical value, and inversely proportional to √n.

    Lowering the confidence level will lower the critical value, which will decrease the margin of error. Decreasing the sample size will increase the margin of error.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “You collect a random sample of size n from a population and calculate a 90% confidence interval. Which of the following strategies would ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers