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# Can someone help me with this equation it is quite confusing and I am not sure if I am doing the steps correctly.

I took two screen shots so the whole question can be seen    all 58% 5:47 PM
webassign.net/web/Sti
4
. . .
Reaction
Within 5 Minutes
After 5 Minutes
Row Total
None
46
462
Mild
416
67
392
Strong
Column Total
17
325
129
146
500
500
1000
Let's use the following notation for the various
events: W = washing oil off within 5 minutes, A =
washing oil off after 5 minutes, N = no reaction, M =
mild reaction, S = strong reaction. Find the following
probabilities for a person selected at random from
this sample of 1000 subjects. (Use 3 decimal places.)
(a) P(N) 0.5
P(M) 0.392
P(S) 0.146
(b) P(N | W) 0.832
P(S | W) 0.034
(C) P(N | A) 0.092
P(S |A) 0.258
(d) P(N and W)
P(M and W)
(e) P(N or M)
Are the events N = no reaction and M = mild
reaction mutually exclusive? Explain.
Yes. P(N and M) = 0.
No. P(N and M) = 0.
No. P(N or M) = 0.
Yes. P(N or M) = 0.
(f) Are the events N = no reaction and W =
washing oil off within 5 minutes independent?
Explain.
No. P(N and W) = P(N) - P(W).
Yes. P(N and W) # P(N) . P(W).
No. P(N and W) = P(N) - P(W).
Yes. P(N and W) = P(N) . P(W).
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(d) 0.416;... View the full answer

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