# How to build x and R chart

When set at the standard position, Autopitch can

throw hard balls toward a batter at an average speed

of 60 mph. Autopitch devices are made for both

major- and minor-league teams to help them improve

their batting averages. Autopitch executives

take samples of 10 Autopitch devices at a time to

monitor these devices and to maintain the highest

quality. The average range is 3 mph. Using controlchart

techniques, determine control-chart limits for

averages and ranges for Autopitch.

https://brainmass.com/math/vector-calculus/how-to-build-x-and-r-chart-464147

#### Solution Summary

The solution provides steps how to find out x and R chart.

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