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Joe is measuring the widths of doors he bought to install in an apartment complex. He measured 72 doors and found a mean width of

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Joe is measuring the widths of doors he bought to install in an apartment complex. He measured 72 doors and found a mean width of 36.1 inches with a standard deviation of 0.3 inches. To test if the doors differ significantly from the standard industry width of 36 inches, he computes a z-statistic. X - U Z= O What is the value of Joe's z-test statistic? O -2.83 O -1.81 O 1.81 O 2.83

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