Tablet PC Comparison provides a wide variety of information about tablet computers. The company's wistates consumers to easily compare different tablets using factors such as cost$,$ type of operating system, display size, wattery life, and CPU manufacturer. A sample of $4$ tablet computers is shown below $($Tablet PC Comparison website, February $28,2013).$

Display Battery

Operating Size Life

CPU

$\backslash$table$[[,$Cost $($$$),$System,$($Inches$),($Hours$)$ Manufacturer,$],[$Tablet$,289,$Android,$8\mathrm{.}9,9,$TI OMAP$],[$Amazon Kindle Fire HD$,289,$IOS,$9\mathrm{.}7,11,$Apple$],[$Apple iPad $4,490,$Windows,$10\mathrm{.}6,4,$Intel$],[$Microsoft Surface Pro,$899,$Windra,,,$]]$

What is median display size?