Statistics with Probability

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    Ezra Halleck

    A president’s Job Approval rating is one of best indicators for assessing his/her chances of reelection. On May 5, 43% of potential voters say they at least somewhat approve of the president’s job performance. 53% at least somewhat disapprove. You would like to see if the national opinion is the same as that of New York State. You do a poll of 1000 potential voters randomly sampled from the entire state (See the excel file) and would like to find out if New York’s approval of the President differs from that of the nation as a whole. H0: NYS approval = national approval.
    (a) Calculate the Test Statistic and the degree of freedom.
    (b) Calculate the p value. At the α=1% significance level, what can you say?

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