Question 383648
Find the z-score so that {{{P(z)=0.90}}}.
Using EXCEL's NORMSINV for {{{P(z)=0.90}}}, {{{z=1.281552}}}.
{{{z=(x-mu)/sigma}}}
{{{(x-100)/10=1.28152}}}
{{{x-100=12.8152}}}
{{{x=112.8152}}}
Rounding up, {{{highlight(x=113)}}}