Question $2$

The following readings might represent the observed time in seconds of an operation of $3$ elements

Remove part from die

Element $1$

$1$

$2$

$3$

$4$

$5$

$6$

$7$

$8$

Rating

Lubricate die, inspect

Element $2$

$\backslash$table$[[13,23],[14,19],[13,23],[12,19],[12,19],[13,19],[13,21],[12,19],[0\mathrm{.}94,1\mathrm{.}02]]$

The normal time for the whole operation with alpha of $0\mathrm{.}05$