Question 426942
{{{5 >= (s/sqrt(n))*1.96}}}

<==> {{{5 >= (60/sqrt(n))*1.96}}}
<==>  {{{25/588 >= 1/sqrt(n)}}}
<==> {{{588/25 <= sqrt(n)}}}
<==> {{{23.52 <= sqrt(n)}}}
<==> {{{553.19 <= n}}}
The smallest sample is thus 554.