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Math Help - testing hypothesis...stats

  1. #1
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    testing hypothesis...stats

    90% of adults drink milk.
    There was a campaign across a multi-county area.
    Of 750 adults, 657 of them say they drink milk.
    Do these responses provide strong evidence that the 90% figure is not accurate for this region?

    I figured it out that the
    SD=.0109
    zscore=-2.2
    P=.028

    I know how to figure this out, but how do I come up with a conclusion? What does this mean?
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    Quote Originally Posted by Morgan82 View Post
    90% of adults drink milk.
    There was a campaign across a multi-county area.
    Of 750 adults, 657 of them say they drink milk.
    Do these responses provide strong evidence that the 90% figure is not accurate for this region?

    I figured it out that the
    SD=.0109
    zscore=-2.2
    P=.028

    I know how to figure this out, but how do I come up with a conclusion? What does this mean?
    Is the p-value significant? At the \alpha = 0.05 level it is, but it's not at the \alpha = 0.01 level .....

    Do you understand the concept of significance level?
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