- What do you understand by inspection of attributes and inspections of variables?
In which case the sample size (for the same confidence level) is more and why?
Weight of pineapple cans with fruit and juice is measured in kg from a continuous production run. Every day a sample of 4 cans are picked up at random and weighed. The data so collected are given in the following table. Plot the $\overbar{X}$ and R charts with their control limits.
What is your observation of behaviour? What suggestions you wish to make for a proper control of the process?
|
DAY
|
WEIGHT OF CN WITH FRUIT AND JUICE, kg
|
|
1
|
2
|
3
|
4
|
|
Day-1
|
1.20
|
1.24
|
1.25
|
1.25
|
|
Day-2
|
1.24
|
1.28
|
1.28
|
1.14
|
|
Day-3
|
1.10
|
1.20
|
1.26
|
1.26
|
|
Day-4
|
1.18
|
0.98
|
1.18
|
1.16
|
Constant:
A for control limits of $\overbar{X}$ = 0.729
B for control limits of R = 2.282