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The 95% confidence interval of (2.282, 8.118) does not contain the value 0. This shows that the difference in means of the weekly loss of labor hours before and after the industrial safety awareness program is significant.
That is, there exists a significant difference in the population means of weekly loss of labor before and after the industrial safety awareness at 5% level of significance.
We are 90% confident that the mean salary of all CEO's in the electronics industry falls in the interval $139048 to $154144.