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probability

/in /by

Question

1.     Suppose the birth weight in a local community is approximately normal with µ=7.8 lbs and the σ=1.9

lbs .

a.      What is the 10th percentile of the birth weight?

b.     What is the probability of finding a new born weighing at least more than 7 lbs?

c.      What proportion of newborns will have their birth weight to be between 6.5 and 8.0 lbs, the healthy birth weight range according to the national standards?

d.     In a sample of 60 babies what is the probability that the mean birth weight is more than 6.5 lbs? 

 
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