5, Over a long period of time a certain it has been prescribed. If a doctor or i

Question

5, Over a long period of time a certain it has been prescribed. If a doctor or is now administering this drug to five patients, four of them? Show the result of been drug has been effective in 90% of the cases in n prescribed. If a doctor at is the probability that it will be effective for adm administering circle one of the multiple choice answers. (6 points) A) 0.3875 B)0.52 18 C)0.6211 D) 0.3281 Use Poisson Distribution to solve problems 6-7 6. The number of calls received by a car towing service averages 1.25 per hour Poisson distribution to find the probability that in a randomly selected hour the number of calls is 2. Show the result of probability calculations and circle one of Use the answers. (6 points) A) 0.1865 B) 0.2238 C) 0.1586 D) 0.3524

Explanation / Answer

Solution5:

Binomial distribution problem

n=5

x=4

probability of success=p=90%=0.9

probability of failure=q=1-p=1-0.9=0.1

P(X=x)=ncx*p^x*q^n-x

P(X=4)=5C4*0.9^4*0.1^5-4

P(X=4)=5*0.9^4*0.1

P(X=4)=0.32805=0.3281

MARK OPTION D

Solution6:

lambda=1.25

poisson distribution formula is

P(X=x)=e^-lamba *(lamda)^x /x!

P(X=2)

=e^-1.25*1.25^2/2

=0.44776/2

=0.2238

MARK OPTION B

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