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order Group Title

In Scotland in November on average 80% of days are cloudy. Assume that the weather on any one day is independent of the weather on other days. (i) use normal approximation to find the probability of there being fewer than 25 cloudy days in Scotland in Novermber (30 days).

  • 2 years ago
  • 2 years ago

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  1. order Group Title
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    I used binomial contribution, which gave an exact answer, but I have to use the normal distribution to get an approximation. Any idea?

    • 2 years ago
  2. amorfide Group Title
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    best i can help is by giving you this http://www.khanacademy.org/ scroll down to statistics

    • 2 years ago
  3. order Group Title
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    I know you have to use np and npq, but I have no clue how, and this site doesn't help much... sorry!! :(

    • 2 years ago
  4. amorfide Group Title
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    this site is very helpful but you can not expect everyone to have been taught the same things as you... we will help when we can but we can't help if we have no knowledge of it... just keep bumping your question until someone answers

    • 2 years ago
  5. amorfide Group Title
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    until then use khanacademy to learn

    • 2 years ago
  6. guykubpom Group Title
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    what is the answer you got from binomial contribution??

    • 2 years ago
  7. order Group Title
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    0.572

    • 2 years ago
  8. guykubpom Group Title
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    ummm I give up sorry lol

    • 2 years ago
  9. order Group Title
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    OK...

    • 2 years ago
  10. guykubpom Group Title
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    but fewer than 25 days is 24 days which is 80 percent of 30 days so it should be 0.5 if 24 days is a mean idk I get confused

    • 2 years ago
  11. order Group Title
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    the end answer should be 0.590

    • 2 years ago
  12. order Group Title
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    but don't know how to get to that.

    • 2 years ago
  13. guykubpom Group Title
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    hang in there lol

    • 2 years ago
  14. order Group Title
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    tryin :D

    • 2 years ago
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