notes.txt

D = disease
S = symptom

for each disease:
1st line: P(D)
3rd line: P(S|D)
4th line: P(S|D')

// For example input from PDF:
P(Diabetes) = 0.13

P(thirst|diabetes) = 0.6
P(wloss|diabetes) = 0.7
P(bvision|diabetes) = 0.9

P(thirst|diab') = 0.2
P(wloss|diab') = 0.3
P(bvision|diab') = 0.015

thirst -> T, wloss -> F, bvision -> U

P(t,w) = 0.18

0.18 * .13
------------
0.18 * .13 + (0.2 * 0.7) *0.87)

(0.13)(0.6)(0.3)
-----------------
Sameasnomiator + (1-0.13)(0.2)(0.7)


Q1:
P(diabetes) * P(thirst|diabetes) * P(wloss'|diabetes)
-----------------------------------------------------
P(thirst) + P(wloss')


P(thirst) = P(thirst|diabetes) * P(diabetes) + P(thirst|diabetes') * P(diabetes')


.13 * .6 * .3 * .9
-----
(1) + .87 * .4 * .7 * .015

0.2106
.003654
.982937512