2. The following data represent samples that were taken on 10 separate days. Each day has a varying sample size and the number of defects for the items sampled is listed. We want to see if this process is consistent and in control.
|
Day |
Sample Size |
Defects |
|
1 |
100 |
3 |
|
2 |
110 |
4 |
|
3 |
195 |
8 |
|
4 |
190 |
5 |
|
5 |
245 |
9 |
|
6 |
250 |
7 |
|
7 |
100 |
15 |
|
8 |
170 |
10 |
|
9 |
250 |
10 |
|
10 |
230 |
12 |
a. Find the UCL.
b. Find the LCL.
c. Is the process in control? Why/why not?
2. The following data represent samples that were taken on 10 separate days. Each day has...
kon over the past 10 days are given below. Sample size is 100. Day Defectives 1 7 2 9 3 9 4 11 5 7 6 8 7 0 8 11 9 13 10 2 a) The upper and lower 3-sigma control chart limits are: UCL, -(enter your response as a number between 0 and 1, rounded to three decimal places). LCL - Center your response as a number between 0 and 1, rounded to three decimal plocos). b) Given...
Given the following measurements representing 10 samples of size 3. find the s-bar, UCL and LCL for a S-bar chart. Is the process in control 2 3 4 5 6 7 8 9 | 10A 10 5 10 8 9 88 892 | 102 103 104 105 101 103N00EUBU 9.94 0.9 103 10.8 || 10 H104 10. 610103 0 19.79 10 3 102 s-bar 027 UCL 0.68 LCL 0 1 The process is in control s-bar 0.27 UCL 0.65 LCLLO...
part b
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The results of inspection of DNA samples taken over the past 10 days are given below. Sample size is 100. 10 Day Defectives 2 3 4 6 6 0 6 a) The upper and lower 3-sigma control chart limits are: UCLp(enter your response as a number between 0 and 1, rounded to three decimal places). LCL(enter your response as a number between 0 and 1, rounded to three decimal places). b) Given the limits in part a, is the process...
Ten samples of 15 parts each were taken from an ongoing process to establish a p-chart for control. The samples and the number of defectives in each are shown in the following table: SAMPLE n NUMBER OF DEFECTIVE ITEMS IN THE SAMPLE 1 15 3 2 15 2 3 15 2 4 15 2 5 15 0 6 15 2 7 15 1 8 15 3 9 15 2 10 15 1 a. Determine the p−p−, Sp, UCL and LCL...
Ten samples of 15 parts each were taken from an ongoing process to establish a p-chart for control. The samples and the number of defectives in each are shown in the following table: SAMPLE n NUMBER OF DEFECTIVE ITEMS IN THE SAMPLE 1 15 2 2 15 0 3 15 3 4 15 3 5 15 3 6 15 1 7 15 3 8 15 2 9 15 0 10 15 3 a. Determine the p−p−, Sp, UCL and LCL...
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Problem 13-7 Ten samples of 15 parts each were taken from an ongoing process to establish a p-chart for control. The samples and the number of defectives in each are shown in the following table: SAMPLE n NUMBER OF DEFECTIVE ITEMS IN THE SAMPLE 1 15 1 2 15 0 3 15 0 4 15 0 5 15 2 6 15 0 7 15 3 8 15 1 9 15 0 10 15 3 a. Determine the p− , Sp,...
A speaker manufacturer molds Kevlar woofer surrounds for use in 6.5” woofers. Samples of 7 woofer surrounds are randomly sampled each five minutes, measured, and the average and range for each sample is computed. The following data represent the summary statistics for the most recent 14 samples. Sample Mean Range 1 6.49” 0.05” 2 6.47” 0.03” 3 6.49” 0.07” 4 6.51” 0.02” 5 6.50” 0.06” 6 6.46” 0.08” 7 6.47” 0.03” 8 6.52” 0.04”...
Ten samples of 15 parts each were taken from an ongoing process to establish a p-chart for control. The samples and the number of defectives in each are shown in the following table: Sample n number of defective items in the sample 1 15 1 2 15 1 3 15 1 4 15 0 5 15 2 6 15 3 7 15 1 8 15 0 9 15 2 10 15 1 a. Determine the p, Sp, UCL and LCL...