Hi i am working on a Binomial Distribution

If i know the Mean of A is 7.6

and

I know the Variance of A is 5.48

How do you write an expression that A >= 28?

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- Oct 18th 2009, 07:15 AMdavidrocastleExpressions for Binomial Distributions
Hi i am working on a Binomial Distribution

If i know the Mean of A is 7.6

and

I know the Variance of A is 5.48

How do you write an expression that A >= 28? - Oct 18th 2009, 07:19 AMCaptainBlack
- Oct 18th 2009, 07:54 AMdavidrocastle
So as the question is put chances of having a work accident is on a weekday is .2 and weekend is .3

A is random variable representing no. of accidents in february

mean of A is 7.6

variance of A is 5.48

for P(<=28)= 1-P(>=27) = 1-Bin(27,?,?.....

Am i on the right path here? - Oct 18th 2009, 08:16 AMCaptainBlack
- Oct 18th 2009, 08:48 AMdavidrocastle
Sorry again i am a bit lost,

what i was looking for is write an expression for probability that A>= 28

How do i calculate N?