A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Two studies were completed in California. One study in northern California involved 1,000 patients; 74% of them experienced flulike symptoms during the month of December. The other study, in southern California, involved 500 patients; 34% of them experienced flulike symptoms during the same month. Which study has the smallest margin of error for a 98% confidence interval?

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The northern California study with a margin of error of 3.2%. The southern California study with a margin of error of 3.2%. The northern California study with a margin of error of 4.9%. The southern California study with a margin of error of 4.9%.

  2. kropot72
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    The margin of error is found from \[\large 2.33\sqrt{\frac{p(1-p)}{n}}\] where p is the sample proportion expressed as a decimal. Therefore the margin of error for the northern California study is \[\large 2.33\sqrt{\frac{0.74\times0.26}{1000}}=you\ can\ calculate.\] Now you need to use the same procedure to find the margin of error for the southern California study.

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so whats the answer?

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @kropot72

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    because both A and D are the answer but only one can be chosen!

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok, A is the correct choice!

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    for future users!

  8. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.