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A sample of 40 companies listed on the stock exchange has an average amount of total...

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Statistics

A sample of 40 companies listed on the stock exchange has anaverage amount of total assets equal to 431,000,000, with astandard deviation of 120,000,000. At level of confidence α=0.05,test the hypothesis that the average for all companies listed onthe exchange is 600,000,000 or more.

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