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See Screen shot A company would like to know if efficiency can be improved through a training course for employees. A sample of employees is

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A company would like to know if efficiency can be improved through a training course for employees. A sample of employees is taken. The time taken for an employee to complete a task before training and aftertraining is observed. Before After Mean 33.1 31.7 Variance 16.31 12.25 Observations 30 30 Hypothesized Mean Difference 0 df 29 t Stat -2.282 , P(T

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