A professor records the number of students who complain each week throughout the semester.If the class size is forty students,what are 3-sigma control limits for this class? Construct a control chart and interpret the data.
Definitions:
Labour Efficiency Variance
The difference between the actual labor hours used and the standard labor hours expected, multiplied by the standard labor rate.
Direct Labour Used
The total effort, measured in hours or costs, of workers directly involved in the manufacturing process of a product.
Variable Manuf. Overhead
Costs that vary with production volume, such as utilities and materials used in manufacturing.
Materials Quantity Variance
The difference between the actual quantity of materials used in production and the expected quantity, valued at standard cost.
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