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17 June, 19:02

When 415 junior college students were surveyed, 150 said they have a passport. constructa 95% confidence interval for the proportion of junior college students that have apassport. round to the nearest thousandth?

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  1. 17 June, 19:13
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    Solution:

    The 95% confident interval will be estimated as follows:

    sample proportion: 150/415=0.362

    ME=1.96*[0.362*0.638/415]=0.0011

    thus

    95% CI

    0.362-0.0011
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