11) Walting time for patients at a medical clilnic is moniltored using x-bar and
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11) Walting time for patients at a medical clilnic is moniltored using x-bar and R charts. Ten samples of ne 8 observations have bean gathered with the following results. What Is the value of R-bar? Mean 72.85 73.36 53.30 67.14 54.19 53.76 46.23 56.21 56.88 68.71 Range 52.192 59.742 35.048 39.466 47.002 52.686 34.167 55.783 30.238 38.742 Sample 10 12) Waliting time for patients at a medical clinic is monitored using x-bar and R charts. Ten samples of n 7 observations have been gathered with the following results. Using this data to establish control charts, what is the lower control limit for the x-bar chart? Sample Mean 51.30 74.80 65.63 58.40 45.18 51.12 3.19 47.61 64.37 53.47 Range 34.432 33.013 48.043 37.545 46.389 46.715 58.735 34.220 59.160 55.687 10 13) Waiting time for patients at a medical clinic is monitored using x-bar and R charts. Ten samples of ne8 observations have been gathered with the following results. Using this data to establish control charts, what is the upper control limit for the x-bar chart? Sample Mean 68:18 62.55 133 48.73 67156 56.78 Range 44.494 46 706 2. 50.909 55.179 44.417 34.133 32.195 451359 54.85Explanation / Answer
11. Given n=6
Overall Mean (x)= 602.43/10= 60.243
Average range (r)= 445.066/10= 44.5066
From the Table of Control Chart Constants:
A2 (6)= 0.483
D2(6)= 2.534
D3(6)= 0
D4(6)= 2.004
For X Bar Chart:
For R Bar:
12. Given n=7
Overall Mean (x)= 575.07/10= 57.507
Average range (r)= 451.93/10= 45.193
From the Table of Control Chart Constants:
A2 (7)= 0.419
D2(7)= 2.704
D3(7)= 0.076
D4(7)= 1.924
For X Bar Chart:
For R Bar:
13. Given n=8
Overall Mean (x)= 577.03/10= 57.703
Average range (r)= 437.85/10= 43.78
From the Table of Control Chart Constants:
A2 (8)= 0.373
D2 (8)= 2.847
D3 (8)= 0.136
D4 (8)= 1.864
For X Bar Chart:
For R Bar:
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