MGNT 3430 (4- 8) The Watson Electric Company produces incandescent light bulbs.
ID: 396126 • Letter: M
Question
MGNT 3430 (4- 8) The Watson Electric Company produces incandescent light bulbs. The following data on the number of lumens for 40-watt light bulbs were collected when the process was in control Sample x-bar 612588 S88600 600 601 24 607603602 585 595 595 597 605 581 570 620 600 614 88600 604 (b) 395 24 4) Find the answer for (a). 5) Find the answer for (b) (round your answers to two decimal points). 6) Which of the following is the upper control limit for an R-chart? 7) Which of the following is the upper control limit for an x-bar chart?Explanation / Answer
Answer= Range = Maximum value- minimum value = 607-597 = 10
Answer:- X bar = (595+614+608+604)/4= 605.25
Answer:- Range for sample 4 = 620-588=32
R bar = (24+10+22+32+24)/5 =22.4
R chart control limits
UCL R= D4*R =2.282*22.4=51.12
LCLR=D3*R =0*22.4=0
Answer:- X Chart control limit:-
UCL =X bar +A2*R = 605.25+0.729(22.4)=621.58
LCL= X bar -A2*R = 605.25+0.729(22.4)=588.92
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