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# S1 exam question - normal distribution

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1. http://i45.tinypic.com/34hjs5d.png
In part c, where did the 0.5244 come from?
2. The percentage points table, for 0.3
3. Your link isn't opening on my computer but the value of 0.3 in your tables would give you a z value of 0.5244...
4. You're doing what you did in (b) but for P(X>172) = 0.3

... I think.

I did S1 last year and doing S2 this year... S2 is all normal distribution.
5. (Original post by Spellstheend)
The percentage points table, for 0.3

(Original post by mathswiz:))
Your link isn't opening on my computer but the value of 0.3 in your tables would give you a z value of 0.5244...
Oh of course! Thank you!

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