Homework: Homework 9 Save Score: 2 of 5 pts 4 of 7 (7 complete)> HW Score: 71.83

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Homework: Homework 9 Save Score: 2 of 5 pts 4 of 7 (7 complete)> HW Score: 71.83%, 21 55 of 30 pts 15.1.33-T Question Help were born to 585 In 1997 a national vital statistics report indicated that about 2.2% of all births produced tins Is the rate of twin births the same among very young mothers? Data from a large city hospital found on y 10 sets of t teenage girls. Test an appropriate hypothesis and state your conclusion. Be sure the appropriate assumptions and conditions are satisfied before you proceed Yes State the null and altenative hypotheses. Choose the correct answer below. A. Ho:p=0.022 HA p>0.022 MB. Ho:p=0.022 He' p #0 022 C. Ho: p = 0 022 HA: p0.022 D. The assumptions and conditions are not met, so the test cannot proceed Determine the z-test statistic. Select the correct choice below and, if necessary, fill in the answer box to complete your choice OA. (Round to two decimal places as needed) O B. The assumptions and conditions are not met, so the test cannot proceed Click to select and enter your answer(s) and then click Check Answer parts Clear Al Final Check

Explanation / Answer

Ans:

Given that

sample proportion=10/585=0.0171

n=585

Test statistic:

z=(0.0171-0.022)/sqrt(0.022*(1-0.022)/585)

z=-0.81

Option A is correct(-0.81)

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