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Question $7,$ Problem $1$

Part $1$ of $2$

HW Score: $40\%,6$ of $15$ points

Points: $0$ of $1$

At Quick Car Wash, the wash process is advertised to take less than $7$ minutes. Consequently, management has set a target average of $380$ seconds for the wash process. Suppose the average range for a sample of $9$ cars is $12$ seconds. Use the accompanying table to establish control limits for sample means and ranges for the car wash process.

Click the icon to view the table of factors for calculating three$-$sigma limits for the $\stackrel{}{x}-$chart and $R-$chart

The ${?}_{CL}^R$ equals $$ seconds and the $L_{CL}$ equals $$ seconds. $($Enter your responses rounded to two decimal places.$)$