Question

Gender

Blood Type Male Female TOTAL
A 105 93 198
B 99 84 183
O 160 140 300
AB 15 18 33
TOTAL 379 335 714
Which blood type is independent of gender?

Answer 1

A

Explanation:

It's actually A, I used the other person's answer of AB and it was wrong and I picked every other answer I could and it showed show answer and it says it's A.

Answer 2

AB

Explanation:

If blood type is independent of gender then we must have for each blood type 50% males and 50% females

Let us compare with this view each blood type

A

Observed 105 93 198 105 93 198

Expected 99 99 198 99 99 198

(O-E)^2 36 36 72

(O-E)^2/E 0.363636364 0.363636364 0.727272727

B

Observed 105 93 198 99 84 183

Expected 99 99 198 91.5 91.5 183

(O-E)^2 56.25 56.25 112.5

(O-E)^2/E 0.614754098 0.614754098 1.229508197

AB

Observed 15 18 33

Expected 16.5 16.5 33

(O-E)^2 2.25 2.25 4.5

(O-E)^2/E 0.136363636 0.136363636 0.272727273

O

Observed 160 140 300

Expected 150 150 300

(O-E)^2 100 100 200

(O-E)^2/E 0.666666667 0.666666667 1.333333333

We find that the deviations are the least for blood group AB

So AB blood group is independent of gender