angle readings $($only seconds are shown$).$

$\backslash$table$[[31\mathrm{.}8,32\mathrm{.}3,31\mathrm{.}9,30\mathrm{.}2,31\mathrm{.}4],[32\mathrm{.}7,31\mathrm{.}1,31\mathrm{.}0,31\mathrm{.}2,30\mathrm{.}3],[30\mathrm{.}4,30\mathrm{.}9,31\mathrm{.}4,31\mathrm{.}0,31\mathrm{.}4],[30\mathrm{.}8,31\mathrm{.}8,31\mathrm{.}5,30\mathrm{.}6,30\mathrm{.}4],[31\mathrm{.}4,30\mathrm{.}2,31\mathrm{.}3,31\mathrm{.}5,]]$

Compute the mean, median and mode of the observation set. Prepare a histogram of the data with a class width of ${0\mathrm{.}5}^{}$

Compute the variance and standard deviation of the observation set.

Construct the $95\%$ probable error. What percentage of the measurements lie in the E$95$ range?

Compute the $99\mathrm{.}7\%$ probable error, are any of these measurements outside of this range & should be considered blunder?