PLEASE SHOW WORK!!! A certain polymer is used for evacuation systems for aircraft. It is important that the polymer be resistant to the aging process. Twenty specimens of the polymer were used in an experiment. Ten were assigned randomly to be exposed to an accelerated batch aging process that involved exposure to high temperatures for $10$ days. Measurements of tensile strength of the specimens were made, and the tensile strengths in psi were recorded in the accompanying table. Complete parts $($a$)$ through $($d$)$ below.

Click the icon to view the data on polymer tensile strengths.

$($a$)$ Do a dot plot of the data.

Click here to view dot plot a$.$

Click here to view dot plot C $.$

'Click here to view dot plot d$.$

Click here to view dot plot b $.$

$($b$)$ From your plot, does it appear as

A$.$ No$.$ The observations for pol

B$.$ Yes. The observations for $pd$

C$.$ No$.$ The observations for pol

$\text{'}$D$.$ Yes. The observations for polymers with aging are generally lower than for those with no aging.

$($c$)$ Calculate the sample mean tensile strength of the two samples.

The mean for the $"$no aging" group is $$ psi. $$

The mean for the "aging" group is psi.