What is the upper control limit for the r-chart

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DTM is a manufacturer of touch sensitive displays used in mobile devices. Last year the factory in Vietnam produced 3 million displays. The rigorous quality control process detected defects in 12 displays. Given this information, find out the errors per million opportunities?

DTM is a manufacturer of touch sensitive displays used in mobile devices. Last year the factory in Vietnam produced 2.5 million displays. The rigorous quality control process detected defects in 30 displays. Given this information, find out the errors per million opportunities?

DTM is a manufacturer of touch sensitive displays used in mobile devices. Last year the factory in Vietnam produced 2.5 million displays. The rigorous quality control process detected defects in 15 displays. Given this information, find out the errors per million opportunities?

A salon and spa chain periodically analyzes its service times to check for variation in service processes using x-bar and R charts. Daily random samples, each containing service times observed with eight different customers are collected. The average mean and the average range of the service times for the past week were 27.2 and 3.76 minutes, respectively. The value of D4for a sample size of eight is 1.864. What is the upper control limit (UCL) for the R-chart? Enter the value with two decimal places?

Reference no: EM132835992

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