Question $2$

The NIST Standard Reference Database gave the following summary informationfor fracture strengths $($MPa$)$ of $138$ ceramic bars fired in a particular kiln:

$$

$$

$=$

$83\mathrm{.}14$

x

$=83\mathrm{.}14,$

$$

$=$

$2\mathrm{.}73$

s$=2\mathrm{.}73.$