# Statistics Control Limits

A tire company is interested in monitoring the process that produced tread thickness on its tires. Every hour 4 tires are selected from production and the tread thickness is measured. Data for the past 25 days is shown as follows:

(Please see the attached file.)

a. What type of control chart would you recommend be used in this case?

b. Compute the upper and lower control limits for these data.

https://brainmass.com/statistics/central-limit-theorem/statistics-control-limits-505555

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