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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).
 one year ago
 one year ago
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).
 one year ago
 one year ago

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orderBest ResponseYou've already chosen the best response.0
I used binomial contribution, which gave an exact answer, but I have to use the normal distribution to get an approximation. Any idea?
 one year ago

amorfideBest ResponseYou've already chosen the best response.0
best i can help is by giving you this http://www.khanacademy.org/ scroll down to statistics
 one year ago

orderBest ResponseYou've already chosen the best response.0
I know you have to use np and npq, but I have no clue how, and this site doesn't help much... sorry!! :(
 one year ago

amorfideBest ResponseYou've already chosen the best response.0
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
 one year ago

amorfideBest ResponseYou've already chosen the best response.0
until then use khanacademy to learn
 one year ago

guykubpomBest ResponseYou've already chosen the best response.0
what is the answer you got from binomial contribution??
 one year ago

guykubpomBest ResponseYou've already chosen the best response.0
ummm I give up sorry lol
 one year ago

guykubpomBest ResponseYou've already chosen the best response.0
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
 one year ago

orderBest ResponseYou've already chosen the best response.0
the end answer should be 0.590
 one year ago

orderBest ResponseYou've already chosen the best response.0
but don't know how to get to that.
 one year ago
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