A manufacturer of solid wood cabinetry requires that its lumber has moisture content (MC) between 5% and 9%.Twenty-five subgroups, each consisting of six pieces of lumber, yield an average MC of 6.95% and an average range of 2.2%.The estimated process standard deviation () is ________________________ .
A)0.18%
B)0.87%
C)1.22%
D)2.2%
E)2.74%

Question

A manufacturer of solid wood cabinetry requires that its lumber has moisture content (MC) between 5% and 9%.Twenty-five subgroups, each consisting of six pieces of lumber, yield an average MC of 6.95% and an average range of 2.2%.The estimated process standard deviation () is ________________________ .
A)0.18% 
B)0.87% 
C)1.22% 
D)2.2% 
E)2.74%

Quizplus · Accepted Answer

The Answer of A manufacturer of solid wood cabinetry requires that its lumber has moisture content (MC) between 5% and 9%.Twenty-five subgroups, each consisting of six pieces of lumber, yield an average MC of 6.95% and an average range of 2.2%.The estimated process standard deviation () is ________________________ .
A)0.18% 
B)0.87% 
C)1.22% 
D)2.2% 
E)2.74%

A Manufacturer of Solid Wood Cabinetry Requires That Its Lumber