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Math Help - Hypothesis testing

  1. #1
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    Hypothesis testing

    can anyone out there help me with Hypothesis Math


    Thanks,
    Nisa
    Last edited by LilFire11; March 6th 2008 at 07:49 AM. Reason: need to att. math
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  2. #2
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    hypothesis math

    Hypothesis test for a population proportion
    A decade-old study found that the proportion, , of high school seniors who believed that "getting rich" was an important personal goal was . A researcher decides to test whether or not that percentage still stands. He finds that, among the high school seniors in his random sample, believe that "getting rich" is an important goal. Can he conclude, at the level of significance, that the proportion has indeed changed?

    Perform a two-tailed test. Then fill in the table below.

    Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.)


    The null Hypothesis : Ho : p = 0.70

    The alternative hypothesis: H1: p ≠ 0.70

    The type of test statistic: Z

    The value of the test statistic:

    (Round to at least three decimals)

    The two critical values at the

    0.05 level of significance:

    (Round to at least three

    Decimal places)

    Can we conclude that the proportion of high school seniors who yes or no

    Believe that “getting rich” is an important goal has changed?

    This is what I know so far:

    (225) x (0.70) = 157.5 > 5 and n(1-p)=(225) X (1-0.70) = 68.5 > 5

    (175) x ((0.70) = 122.5>5 and n(1-p)= (175) X (1-0.70)= 52.5 >5

    So now I have

    52.5 – 0.70

    67.5

    √0.70 (1-0.70)

    225

    This is where I am stuck. I can not come up with the value of the test statistic or the two critical values……… Can you please help me; I need step by step instructions.
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  3. #3
    Grand Panjandrum
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    Quote Originally Posted by LilFire11 View Post
    can anyone out there help me with Hypothesis Math


    Thanks,
    Nisa
    Your question is about Hypothesis Testing, which is statistics. These posts do
    not belong in the Math News forum, nor should you ever tag a new question
    onto the end of an existing thread.

    That is two of the rules you have broken with a single post. Please read the rules,
    they are under the second item on the first darker blue tool bar at the
    top of every page on this site.

    RonL
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