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A random sample of 100 from the Bureau of Statistics states that the average life expectancy of people in Country XYZ is 69.5 years with

A random sample of 100 from the Bureau of Statistics states that the average life expectancy of people in Country XYZ is 69.5 years with a standard deviation of 7.9 years. With a significance level of 0.05, test the hypothesis that the current average life expectancy is more than 68 years?

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