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S1 exam question - normal distribution

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    In part c, where did the 0.5244 come from?
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    The percentage points table, for 0.3
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    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...
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    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.
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    (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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