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Math Help - p value? critical z value? test statistic? help please=(

  1. #1
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    p value? critical z value? test statistic? help please=(

    Critical z value and p value help please?
    Use a significant level of a=0.01 to test the claim that p1=p2. use the given sample sizes and numbers of successes to find (a) pool estimated p (b) the z test statistic (c) the critical z values and (d) the p value.

    Treatment group Placebo group
    n1=500 n2=200
    x1=100 x2=50

    p=?
    z=?
    critical z value=?
    p-value=?
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  2. #2
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    Re: p value? critical z value? test statistic? help please=(

    Let's start with part a)

    p_1 = \frac{x_1}{n_1} and p_2 = \frac{x_2}{n_2} then

    p_{pooled} = \frac{p_1\times n_1+p_2\times n_2}{n_1+n_2}

    What do you get?
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