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There have been complaints that the sports page of the Dubuque Register has lots of typos....

There have been complaints that the sports page of the Dubuque Register has lots of typos. The last 6 days have been examined carefully and the number of typos/page is recorded below. Is the process in control using Z = 3? Day Number of Typos Monday 12 Tuesday 5 Wednesday 8 Thursday 7 Friday 6 Saturday 0

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