15. O 1/2 points | Previous Answers My Notes Ask Your Consider the binomial rand

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15. O 1/2 points | Previous Answers My Notes Ask Your Consider the binomial random variable x with n 36 and p = 0.85 (a) Find the mean. Hint: Check the formula for computing the mean of a binomial random variable. (Give your answer correct to one decimal place.) 30.6 (b) Find the standard deviation. (Give your answer correct to two decimal places.) Hint: Check the formula for computing the variance of a binomial random variable. Submit Answer SaveProgress Practice Anotherversm 16. + 1r1 points Previous Answers Notes Ask Your Teacher Of all the trees planted by a landscaping firm, 4 % survive. What is the probability that 12 or more of the 14 t ees the just planted will surv e? G ver your answer corect to four decimal places.) 0.0006 Check if a binomial probability distribution applies here 12:10PM 2/11/20182 O Type here to search

Explanation / Answer

Ans:

15)Given that

n=36 and p=0.85

a)mean=np=36*0.85=30.6

b)standard deviation=sqrt(np(1-p))=sqrt(36*0.85*0.15)=2.14

16)Given that

n=14,p=0.4

P(x>=12)=1-binomcdf(14,0.4,11)=0.0006

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