From the Gaussian error curve, what is the probability that a result from population lies between -o and -30 ? Given that area under Gaussian curve for ± o= 68.3% and + 30= 99.7 % O 13.60 %

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A: Given: n=479p=0.12 Use normal approximation with mean μ and standard deviation σ. μ=np   =479*0.12…

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