Part $3$: Thermal expansion and uncertainties

$\backslash$table$[[$Q$4$ Consider the following experiment where the objective is to estimate the thermal expansior$],[$coefficient of a certain material.$],[$A rod of an initial length $L=1000mm$ is used. A temperature change $T$ of $10C$ was applied$],[$and $L$ was measured. The experiment was repeated five times and the results are as$],[$follows:$],[L=2mm,2\mathrm{.}1mm,2\mathrm{.}1mm,1\mathrm{.}9mm,1\mathrm{.}8mm$