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Jennifer Cantu, VP of Customer Services at Tri-State Auto Insurance, Inc., monitors the claims processing time of the claims division. Each week, her staff randomly selects a sample of 60 claims and tests the null hypothesis that the "mean processing time is 5 days or less." Jennifer chooses a 0.01 level of significance, the critical Z value is...

I keep coming up with 2.33 as the critical value and I'm doing it by hand. Is this correct?

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Solution Summary

The expert calculates the critical z value for tail tests.

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