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प्रश्न
Write the control limits for the mean chart
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उत्तर
The calculation of control limits for `bar"X"` chart in two different cases are
| Case (i) When `bar"X"` and SD are given |
Case (ii) When `bar"X"` and SD are not given |
|
UCL `\overset{==}{"X"} + sigma/sqrt("n")` CL = `\overset{==}{"X"}` LCL = `\overset{==}{"X"} - 3 sigma/sqrt("n")` |
UCL = `\overset{==}{"X"} + "A"_2 bar"R"` CL = `\overset{==}{"X"}` LCL = `\overset{==}{"X"} - "A"_2bar"R"` |
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संबंधित प्रश्न
Define Statistical Quality Control
Define a control chart
What are the uses of statistical quality control?
In a production process, eight samples of size 4 are collected and their means and ranges are given below. Construct mean chart and range chart with control limits.
| Samples number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| `bar"X"` | 12 | 13 | 11 | 12 | 14 | 13 | 16 | 15 |
| R | 2 | 5 | 4 | 2 | 3 | 2 | 4 | 3 |
Choose the correct alternative:
How many causes of variation will affect the quality of a product?
Choose the correct alternative:
Variations due to natural disorder is known as
Choose the correct alternative:
A typical control charts consists of
Choose the correct alternative:
`bar"X"` chart is a
Choose the correct alternative:
The LCL for R chart is given by
From the following data, calculate the control limits for the mean and range chart.
| Sample No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Sample Observations |
50 | 21 | 50 | 48 | 46 | 55 | 45 | 50 | 47 | 56 |
| 55 | 50 | 53 | 53 | 50 | 51 | 48 | 56 | 53 | 53 | |
| 52 | 53 | 48 | 50 | 44 | 56 | 53 | 54 | 549 | 55 | |
| 49 | 50 | 52 | 51 | 48 | 47 | 48 | 53 | 52 | 54 | |
| 54 | 46 | 47 | 53 | 47 | 51 | 51 | 47 | 54 | 52 |
