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The distribution of a population of mechanical aptitude

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The distribution of a population of mechanical aptitude test is normal, with a mean of 46 and a standard deviation of 4. To test the impact of a job training program, a sample of 26 scores was obtained from employees who took the training program. The sample yielded a mean of 53.

State the Null hypothesis?

What z score must be obtained from the sample in order to reject the null hypothesis at an alpha level of .05?

Reference no: EM13613143

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