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20 August, 12:17

In 2001 a national vital statistics report indicated that about 3% of all births

produced twins. Is the rate of twin births smaller among very young mothers?

Data from a large city hospital found that only 7 sets of twins were born to 469

teenage girls. Test an appropriate hypothesis and state your conclusion under

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Answers (1)
  1. 20 August, 16:14
    0
    The student has the following work towards answering the question but several things have been written down or calculated incorrectly.

    H0 : P = 0.9

    Ha : p < 0.9

    SRS, 750 > 10

    P = 657/750 = 0.876
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