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13. Here is a table showing fictitious trial results of a new acne medication: Used medication (M) Used placebo (L) Total Condition improved (1) 5 35 40 No change (N) 5 20 25 Condition worse (W) 40 145 185 Total 50 200 250 Assume that a participant is selected at random. Let M be the event that the participant used the medication, L the event that the participant used the placebo, I the event that the participant's condition improved, and so on as shown by the letters in the headings. (a) P(W | _) = Check Clear Give the exact answer; not a decimal approximation. (b) P(L | W) = Check Clear Give the exact answer; not a decimal approximation. (c) P(W) = Check Clear Give the exact answer; not a decimal approximation. (d) P(L) = Check Clear Give the exact answer; not a decimal approximation. (e) Test the events N and L for independence. Independent Dependent (f) Test the events I and L for independence. OIndependent Dependent