A distance AB

is observed repeatedly using the same equipment and procedures, and the results, in meters, are listed below:

$73\mathrm{.}401,73\mathrm{.}400,73\mathrm{.}402,73\mathrm{.}396,73\mathrm{.}401,73\mathrm{.}401,73\mathrm{.}396,$ and $73\mathrm{.}404.$ Determine the range within which the observations should fall $90\%,95\%$

of the time.