Find cut off values of Z ("Find C if P(-C<Z<C) = 0.95")

feli3105

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Nov 3, 2017
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Hi,

Find C if P(-C<Z<C)=0.95

I know how to find P(-C<Z)=0.95 and P(Z<C)=0.95 but I'm lost on how two find these cut off values, any clarification would be greatly appreciated, thanks.
 
Z is a Standard Normal Random Variable.

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