Question 363393
{{{z=(x-mu)/sigma}}}
{{{z[1]=(31-28)/4}}}
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Now using {{{z[1]}}}, find {{{P(z[1])}}}
{{{P(z1)=P(x<=31)}}}
{{{P(x<=31)+P(x>31)=1}}}
{{{P(x>31)=1-P(x<=31)}}}
{{{P(x>31)=1-P(z[1])}}}