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23 August, 15:14

Use the given information to find the p-value. the test statistic in a two-tailed test is z = - 1.63.

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  1. 23 August, 19:10
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    From standard tables, the p-value for a test statistic of z * = - 1.63 is 0.0516.

    This p-value is for a one-tailed test (the shaded left portion) of the curve shown in the figure below.

    For a two-tailed test, the p-value = 2*0.0516 = 0.1031.

    Explanation:

    The p-value is used to test a claim made in a null hypothesis.

    If the p-value is small (< 0.05) the claim made in the null hypothesis is rejected as being unlikely.

    If the p-value is large (> 0.05), the evidence against the claim is weak, and the conclusion is to fail to reject the hypothesis.

    If the p-value is equal to the cutoff (say, 0.05), it s uncertain to draw a conclusion.
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