1 Big babies: A government agency reports that25 %of baby boys6-8months old in the United States weigh more than24

pounds. A sample of152babies is studied. Use theCumulative Normal Distribution Tableif needed. round least four decimalplaces.

(a) Approximate the probability that less than42 babies weigh more than 24pounds.

(b) Approximate the probability that28

or fewer weigh more than24pounds.

(c) Approximate the probability that the number who weigh more than24 pounds is between 35 and 45 exclusive.

2.Below,nis the sample size,p is the population proportion of successes, andXis the number of successes in the sample. Use the normal approximation to find the probability. Round to at least four decimal places.

n=80, p =0.45

P(X>42)=

3