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Math Help - [SOLVED] wrong answer,proportion?

  1. #1
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    [SOLVED] wrong answer,proportion?

    A die is thrown 240 times and a 6 turns up 30 times test if the die is biased.
    The answer given is no due to the test statistic being -1.73 but frankly i cant see this as i get \sqrt{6} not \sqrt{3} from \frac{\frac{30}{120}-\frac{1}{6}}{\sqrt{\frac{\frac{1}{6}\frac{5}<br />
{6}}{120}}}=z any ideas?
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  2. #2
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    i misread question was 240 not 120''.
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