SOLUTION: Describe the weight of the top 10% of the babies born with each gestation period. a. 37 to 39 weeks - mean birth weight=7.31lb, standard deviation=1.09lb b. 42 weeks and over -

Algebra ->  Probability-and-statistics -> SOLUTION: Describe the weight of the top 10% of the babies born with each gestation period. a. 37 to 39 weeks - mean birth weight=7.31lb, standard deviation=1.09lb b. 42 weeks and over -       Log On


   

Question 376225: Describe the weight of the top 10% of the babies born with each gestation period.
a. 37 to 39 weeks - mean birth weight=7.31lb, standard deviation=1.09lb
b. 42 weeks and over - mean birth weight=7.61lb, standard deviation=1.11lb.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

*Note: z+=+blue%28x+-+mu%29%2Fblue%28sigma%29

P = .90 then z = NORMSINV(0.9) = 1.28



1.28 = ( x - 7.31) / 1.09

1.28*1.09 = x - 7.31

1.40 + 7.31 = x

8.71 lbs = x

the weight of the top 10% of the babies born > 8.71 lbs



1.28 = ( x - 7.61) / 1.11

1.28*1.11 = ( x - 7.61)

1.42 + 7.61 = 9.03 lbs = x

the weight of the top 10% of the babies born > 9.03 lbs