Suppose xx is a normally distributed random variable with μ=8.9μ=8.9 and σ=3.9σ=3.9. Find each of the following probabilities: (a)  P(6.8≤x≤16.2)=P(6.8≤x≤16.2)=  (b)  P(8.6≤x≤14.7)=P(8.6≤x≤14.7)=  (c)  P(7.5≤x≤14.5)=P(7.5≤x≤14.5)=

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 Suppose xx is a normally distributed random variable with μ=8.9μ=8.9 and σ=3.9σ=3.9. Find each of the following probabilities:

(a)  P(6.8≤x≤16.2)=P(6.8≤x≤16.2)= 

(b)  P(8.6≤x≤14.7)=P(8.6≤x≤14.7)= 

(c)  P(7.5≤x≤14.5)=P(7.5≤x≤14.5)= 

(d)  P(x≥6.3)=P(x≥6.3)= 

(e)  P(x≤16.4)=P(x≤16.4)= 

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As per our guidelines we are supposed to answer only 3 sub-parts of any questions so i am solving first 3 sub-parts only please post the other part separately to get answer 

 

We have given that

Mean(µ) = 8.9
Standard deviations (σ) = 3.9
X ~ N (µ, σ )= N(8.9, 3.9)

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