... the change order gives the variation in processing times due to work load. In managerial question 2c, the study attempts to evaluate how the change order processing time changes due to the work load on the person. This is a population (Cross-Section) study of change order. A Simple plot of no. of documents against the change order gives the variation in processing times due to No. of documents changed. In managerial question 3, we are asked to determine if change order processing time can be estimated. This is also a time-series study, as using the history of change order processing over time, we can attempt to provide management with an estimate of change order processing times in the future. Hence for question 1, we are studying a population, while for questions 2 and 3 we are studying a process. (b) The statistical unit is change order number. Question 2: (a) ...

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