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  • 4 years ago

Suppose that z~ N(0,1). a) Find the prob that z < -1.96 b) Find the prob that z => 1.96 c) Find theprob that 0 < z < 1.645

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  1. mathmate
    • 4 years ago
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    N(0,1) means that z follows the normal distribution, with parameters standard deviation 1 and mean 0. The table of normal distribution is available at many sources, such as your calculator, or the following link: http://www.math.unb.ca/~knight/utility/NormTble.htm Since the area under a probability distribution equals 1.0 and the distribution is symmetrical about the mean, only half of the table (betwen z=0 to infinity) needs to be tabulated. To look for the probability of a negative z-value, you can look up the positive value and subtract from 1.0. Example P(-0.5)=1-P(0.5)=1-0.6915=0.3085

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