For a Manufacturing Process $\overline { \overline X }$ = 10 Inches

Multiple Choice

For a manufacturing process, $\overline { \overline X }$
= 10 inches, $\overline { \mathrm { R } }$
= ) 4 inches,and the subgroup sample size is 6 units.Calculate the standard control limits for the R chart.

A) 0 and .846
B) 0 and .802
C) 0 and .77
D) 0 and 1.0
E) -.09 and .89