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Question $2$

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

$\backslash$table$[[$Remove part from die,Lubricate die, inspect,Place part in fixture$],[$Element $1,$Element $2,],[$Element $3,,,],[1,30,13,23],[2,29,14,19],[3,29,13,23],[4,32,12,19],[5,29,12,19],[6,27,13,19],[7,131,13,21],[8,33,12,19],[$Rating$,0\mathrm{.}90,0\mathrm{.}94,1\mathrm{.}02]]$

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