Subgroups of power supply units are selected once eachhour from an assembly line, and
Chapter 16, Problem 17(choose chapter or problem)
Subgroups of power supply units are selected once eachhour from an assembly line, and the high-voltage output ofeach unit is determined.a. Suppose the sum of the resulting sample ranges for 30subgroups, 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 unitsand the sum is 106.2.
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