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# Stats 2 Normal Dist Question watch

1. Given that X ~ N (15,4), find s correct to 2 d.p.

When:

P(X=<s) = 0.9141
2. (Original post by chillbill79)
Given that X ~ N (15,4), find s correct to 2 d.p.

When:

P(X=<s) = 0.9141
What have you been able to do so far? I presume you know how to standardaize the distribution.
3. so look up the z value which corresponds to an area of 0.9141

then use the formula { X - µ } / σ = z
4. The new spec has ruined these types of questions - you just need to press a few buttons on your calculator
5. (Original post by Notnek)
The new spec has ruined these types of questions - you just need to press a few buttons on your calculator
spit on da new spec my bruddas
6. (Original post by the bear)
so look up the z value which corresponds to an area of 0.9141

then use the formula { X - µ } / σ = z
Thanks. I understand now. Will do a few more questions for practice.

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