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According to a factory employer, the mean working time of workers in the factory is 6 hours with a standard deviation of 0.5 hours. A
According to a factory employer, the mean working time of workers in the factory
is 6 hours with a standard deviation of 0.5 hours. A researcher interviewed 50%
of the employees and found out that their mean working time is 8 hours with a
standard deviation of 1 hour. The level is 0.05. State the null hypothesis and
the alternative hypothesis in (a) words and in (b) symbols.
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