Suppose the sum of the resulting sample ranges

Reference no: EM131087140

Subgroups of power supply units are selected once each hour from an assembly line, and the high-voltage output of each unit is determined.

a. Suppose the sum of the resulting sample ranges for 30 subgroups, each consisting of four units, is 85.2. Calculate control limits for an R chart.

b. Repeat part (a) if each subgroup consists of eight units and the sum is 106.2.

Reference no: EM131087140

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