l Verizon LTE 10:46 AM a docs.google.com PRACTICE PROBLEM 1: what type of contro
ID: 385494 • Letter: L
Question
l Verizon LTE 10:46 AM a docs.google.com PRACTICE PROBLEM 1: what type of control chart should be used?* Twenty samples of n 200 were taken by an operator at a workstation in a prodaction process. The number of defective items in each sample was recorded as follows Sample of DefectsSample 112 2 18 3 10 of Defects 16 15 13 16 12 13 14 15 16 17 18 19 516 6 19 17 8 12 9 11 10 14 20 21 O O chart x bar chart O R chart O p cahrt O c chart PRACTICE PROBLEM 1: what is the center-line of this chart (round to the nearest decimal point) * Twenty samples of n 200 were taken by an operator at a workstation in a prodaction process. The number of defective items in each sample was recorded as followS Sample of Defects Sample of Defects
Explanation / Answer
Control charts are graphical representation of data in such a manner to understand whether any process is under statistical control or not.
Let us understand the different types of charts that are used in controling procoesses:
The answer for the problem in terms of the type of chart that would be used for representing the data is C chart.
The center line c=sum of the defects divided by the number of samples collected.
=320/20=16
The UCL is given by the formula, c= c+m(square root of c), where m is usually 3
Therefore UCL= 16+3*4=28
The LCL is given by the formula, c= c- m(square root of c), where m is usually 3
LCL is given by c= 16- 3*4= 16-12= 4
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