QUESTION 6 1 points Save Answer A part that connects two levels should have a di
ID: 350258 • Letter: Q
Question
QUESTION 6 1 points Save Answer A part that connects two levels should have a distance between the two holes of 4". It has been determined that x-bar and R-charts should be set up to determine if the process is in statistical control. Ten times throughout the course of a shift, the quality engineer collected four samples (n=4) from the manufacturing line for inspection. Mean Mean Range Range Group 1 4.01 0.04 Group 2 3.98 0.06 Group 3 4.00 0.02 Group 4 3.99 0.05 Group 5 4.03 0.06 Group 6 3.97 0.02 Group 7 4.02 0.02 Group 8 3.99 0.04 Group 9 3.98 0.05 Group 10 4.01 0.06 What is the x-doublebar value?Explanation / Answer
There are 10 samples. For each, we are given the x_bar values (the mean) and R values (the range).
The x-doublebar is the average of the x_bar values i.e. the average of the second column.
(4.01+3.98+4.00+3.99+4.03+3.97+4.02+3.99+3.98+4.01) / 10 = 3.9980