Asked Dec 8, 2019

A carpenter is making doors that are 2058 millimeters tall. If the doors are too long they must be trimmed, and if they are too short they cannot be used. A sample of 28 doors is made, and it is found that they have a mean of 2069millimeters with a variance of 900. Is there evidence at the 0.05 level that the doors are either too long or too short?


State the null and alternative hypotheses for the above scenario.


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It is given that the sample mean and variance are 2,069 a...

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