Question: Assignment 3) Control charts for bar and R are maintained on the shear strength in pounds of test spot welds. The subgroup size is 7.

Assignment 3)

Control charts for bar and R are maintained on the shear strength in pounds of test spot welds. The subgroup size is 7. The values of bar and R are computed for each subgroup. After 20 subgroups, (xbar)=11,346 and =873.

A) compute the value of the 3-sigma (3) for the and R charts and estimate the value of on the assumption that the process is in statistical control.

B) The specified strength for a weld is 529 lb. If the process is in statistical control and normally distributed, what can you conclude regarding its ability to meet this specification?

Please show all work :)

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