QUESTION $30$

The following sample values represent service times in minutes.

Center lines for the $R$ chart and $x-$bar chart should be the average of the sample ranges and the average of the sample averages, respectively.

$\backslash$table$[[$Observation Number,$],[$Sample Number,$1,3,4,5,],[1,10\mathrm{.}1,10\mathrm{.}6,9\mathrm{.}8,9\mathrm{.}9,10\mathrm{.}9],[2,9\mathrm{.}7,9\mathrm{.}5,10\mathrm{.}3,9\mathrm{.}9,10\mathrm{.}5],[3,10\mathrm{.}1,10\mathrm{.}7,9\mathrm{.}2,10\mathrm{.}0,10\mathrm{.}1],[4,9\mathrm{.}9,9\mathrm{.}8,10\mathrm{.}5,10\mathrm{.}4,10\mathrm{.}1],[5,10\mathrm{.}4,10\mathrm{.}1,10\mathrm{.}9,9\mathrm{.}9,10\mathrm{.}3]]$

For the $x-$bar chart, what is the value of $LCL?$

Less than or equal to $9\mathrm{.}00$

Greater than $9\mathrm{.}00$ but less than or equal to $9\mathrm{.}99$

Greater than $9\mathrm{.}99$ but less than or equal to $10\mathrm{.}99$

Greater than $10\mathrm{.}99$