t ts a stuly of seobeliles it was touand that 32% had alcobolic acher and S% had

Question

t ts a stuly of seobeliles it was touand that 32% had alcobolic acher and S% had akuholic mothers. 35% had at least one alololep mr. What is the probability that a randomly selected alcoholic will have an slcobolic father given that the mother is alcoholic? A)0.1786 B)06210 C)08000 D) 09256 E)00344 5 Consider a sample from a normal population with mean p 125. Let X and S be the respective sample mean and sample standard deviation Assume that the sample sine is n 16, then find the value of k such that A) 2.921 B) 1.753 C)13 D) 1786 E112 A90%conddence interval hr the population mma i.P720M2km The sample se isn- 4 Find the sample standard deviation 6. A) 98734 18) 2.498 C) 7 9823 D) 2.96 7. Asume that the weights of a vulgar is normall popolation of es of the princes b mean wight of the toe o

Explanation / Answer

4)
A = has alcohlic father
B = has alcohlic mother

P(A) = 0.32
P(B) = 0.08
P(A or B) = 0.35
we need
P(A|B) = P(A and B)/P(B)
now P(A and B) = -P(A or B) + P(A ) + P(B)
= 0.32 + 0.08 -0.35
= 0.050.625

P(A|B) = 0.05/0.08 =
0.625

B) is correct

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