Green engineering practices require that their strength be accessed before using them in the base of roadways.

Measurements of the resiliency modulus$($ MPa$)$ on $n=18$ specimens of recycled concrete aggregate produce the ordered values $($Courtesy of Tuncer Edil$).136143147151158160161163165167173174181181185188190205$

$($i$)$ Obtain a point estimate of $,$ the mean resiliency modulus for recycled concrete.

$($ii$)$ Also give the estimated standard error.