If 20 Samples of Size 7 Are Drawn,with $\overline { \overline X }$

Multiple Choice

If 20 samples of size 7 are drawn,with $\overline { \overline X }$

= 33.33 and $\bar { R }$
= 5) 65,what are the LCL and UCL for the R chart?

A) [2.345,8.955]
B) [.076,1.924]
C) [.415,1.585]
D) [.429,10.871]