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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?

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  1. anonymous
    • one year ago
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    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. anonymous
    • one year ago
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    @DanJS

  3. anonymous
    • one year ago
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    @Hero

  4. anonymous
    • one year ago
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    @Loser66

  5. anonymous
    • one year ago
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    Loser I dont get this that much

  6. anonymous
    • one year ago
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    @vera_ewing

  7. anonymous
    • one year ago
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    I think its southern california

  8. anonymous
    • one year ago
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    Just write something and I will give you a medal @Loser66

  9. anonymous
    • one year ago
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    What ever you want

  10. Loser66
    • one year ago
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    hehhehe... I don't want medal, just interesting on the field I never know before. Here is the answer: the first one.

  11. Loser66
    • one year ago
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    I made a short research about it. I learn how to find the answer out, not guess!

  12. anonymous
    • one year ago
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    Help me though

  13. Loser66
    • one year ago
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    if the confidence is 98% , then z =2.33 for the NOrth one the sample is 74%*1000= 740 hence p = 740/1000=0.74

  14. Loser66
    • one year ago
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    Apply the formula margin error = \(z*\sqrt{\dfrac{p(1-p)}{population}}=2.33*\sqrt\dfrac{0.74(1-0.74}{1000}\ )

  15. Loser66
    • one year ago
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    =3.23% the net is so bad.

  16. anonymous
    • one year ago
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    Thanks

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