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13. The Centers for Disease Control and Prevention reports that 25% of baby boyy 6-8 months old in the U.S. weight more than 20 pounds. A sample of 16 babies is studied. n = 160 P= 2510=0 a. Find the probability that exactly 5 of them weigh more than 20 pounds. P(X= 5)=14%s 0.25 ( 1-0.25)14-20,1802 P(X-5)- 0.1802 b. Find the probability that more than 6 of them weigh more than 20 pounds. P(X =0 ) + PCX= 1)+ P(X- 2)+ P(x= 3)+ 5)+P(X=4) 1- C C0 0.250 ( 1-0.25) 16-0+ 106, 12.25'(1-6:25)14-1 5. 252( 1 - . 25) 14- 2 + 142 2 0, 25 3 ( 1-,25)14- 3+1604 6.264(1-.25)14-4+ 164.35 c. Find the probability that few t fewer than 3 of them weigh more than 20 pounds ( 1 25) 14- 5+ leg . 2 3) = P(X=0 )+ PC= 1>+ P(X=2) = 14c .26061-.25)16-014 .35) 14-47 1. 25' ( 1- 25) 14- 1+160 2. 25 (1-.25314-2 6100+. 6535+ D =. 1971 (P(X