A company is researching the effectiveness of a new web site design to decrease the time to access a website. Five web site users were randomly selected and their times $($in seconds$)$ to access the web site with the old and new designs were recorded. The results follow.

$\backslash$table$[[$User$,$Old Web Site Design,New Web Site Design$],[$A$,30,15],[$B$,45,20],[$C$,25,10],[$D$,32,25],[$E$,28,20]]$

What is the value of the test statistic?