Question: 5.37 Down syndrome again Example 8 discussed the Triple Blood Test for Down syndrome, using data summarized in a table shown again below. a. Given

5.37 Down syndrome again Example 8 discussed the Triple Blood Test for Down syndrome, using data summarized in a table shown again below.

Blood Test Down POS NEG Total D 48 6 54 De 1307

a. Given that a test result is negative, show that the probability the fetus actually has Down syndrome is P1D•NEG2 = 0.0015.

b. Is P1D•NEG2 equal to P1NEG•D2? If so, explain why. If not, find P1NEG•D2.

Blood Test Down POS NEG Total D 48 6 54 De 1307 3921 5228 Total 1355 3927 5282

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