A student measures the time period of 100 oscillations

A student measures the time period of 100 oscillations of a simple pendulum four times. The data set is $90 \mathrm{~s}, 91 \mathrm{~s}, 95 \mathrm{~s}$ and $92 \mathrm{~s}$. If the minimum division in the measuring clock is $1 \mathrm{~s}$, then the reported mean time should be :-