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

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

a. Given that a test result is negative, show that the probability the fetus actually has Down syndrome is P(D | NEG) = 0.0015.
b. Is P(D | NEG) equal to P(NEG | D)? If so, explain why. If not, find P(NEG | D).

Blood Test Total 54 5228 5282 Down POS 48 1307 1355 NEG Dc Total 3921 3927

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