Using the class midpoints and corresponding frequencies, estimate the sample mean and standard deviation of the provided data.

$\bar{x}=33.5$

$s=13.2$

$\bar{x}=38.0$

$s=11.9$

$\bar{x}=33.5$

$s=11.9$

$\bar{x}=38.0$

$s=13.2$