For which of the following should we use an R-chart to monitor process quality?
A) Weighing trucks at a highway inspection station to determine if they are overloaded
B) Deciding whether an airliner has sufficient fuel for its trip
C) Student grades measured from 1 to 100
D) Determining whether vehicles from a motor pool will run
E) Determining the accuracy of a forecast of "snow"

Question

Quizplus · Accepted Answer

An R-chart is used to monitor the variability of a process, specifically the range of measurements. Since student grades can vary over a specific period, an R-chart can help identify any significant changes in grading variability.

For Which of the Following Should We Use an R-Chart