Another Probability question..?

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Another Probability question..?

Length of Human Pregnancy is normally distributed with a mean of 266 days and standard deviation of 16 days.

1. Find the probability that a pregnancy last more than 286 days?

2007-03-05 02:38:43 · 2 answers · asked by zack g 1 in Science & Mathematics ➔ Mathematics

2 answers

let x be the no of day
p(x>286)
=p([x-266]/16>1.25)
=p(z>1.25)
find the z score

2007-03-05 02:56:31 · answer #1 · answered by san 3 · 0⤊ 0⤋

(286-266)/16 = 1.25
P(X>1.25) will give you the answer.

2007-03-05 10:58:47 · answer #2 · answered by sahsjing 7 · 0⤊ 0⤋