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Further Maths: S1 - Stupid me... watch

1. Ok question is:

Q) work out V to 2 d.p if:

and X ~ N

So I did:

If I look for 0.6076 on the data sheet it comes to the number:

So put in the numbers to the equation:

and you come out with:

But that isn't the end answer is it because that is the number for less than approximately 60% - so what do I do now?

Thanks in advance and please, if i've done this wrong tell me!
2. The table on the data sheet is for the value of v where P(X<v)=0.6076.
We have P(X<-v) = 1- P(X<v), so 0.273 is your (-v-mu)/sigma
The answer should be v=15 - 0.273*2 = 14.454
3. (Original post by nkvuong)
The table on the data sheet is for the value of v where P(X<v)=0.6076.
We have P(X<-v) = 1- P(X<v), so 0.273 is your (-v-mu)/sigma
The answer should be v=15 - 0.273*2 = 14.454
Is that answer not a little high though for approximately 30% (0.3029)?

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Updated: October 2, 2010
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