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2 answers:
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Answer:
Step-by-step explanation:
a) The two populations were i) the pregnant mothers who took the drug ii) the pregnant mothers who did not take the drugs
b) The data must have been obtained in a survey because experiment was not done.
c) 63 out of 3980 developed abnormalities in I case.
Hence out of 1000 abnormalities estimated =
i.e. approximately 16
d) Mothers who did not take drug
(information incomplete)
e) Medical hypothesis testing requires accurate results and hence sample sizes should be very large.
Answer:
D
Step-by-step explanation:
Using the law of sines in ΔABC, then
=
Substituting in values gives
=
( cross- multiply )
c × sin38° = 25 × sin31.6° ( divide both sides by sin38° )
c = ≈ 21.28 → D