Table 5.11 Factors for Calculating Three-Sigma Limits for the Chart and Chart

question 49

Multiple Choice

Table 5.11
Factors for Calculating Three-Sigma Limits for the Chart and R-Chart
Source: 1950 ASTM Manual on Quality Control of Materials,copyright American Society for Testing Materials.Reprinted with permission.
-Thermostats are subjected to rigorous testing before they are shipped to air conditioning technicians around the world.Results from the last five samples are shown in the table.Calculate control limits for a chart that will monitor performance to target.The correct control limits as (LCL,UCL) are:

• A)(70.46,73.39)
• B)(68.94,74.89)
• C)(69.71,74.14)
• D)(69.80,74.05)

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