Question: help A shareholders' group, in lodging a protest, claimed that the mean tenure for a chief executive officer (CEO) was at least nine years. A

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A shareholders' group, in lodging a protest, claimed that the mean tenure for a chief executive officer (CEO) was at least nine years. A survey of companies reported in The Wall Street Journal found a sample mean tenure of x - 7.87 years for CEOs with a standard deviation of s 6,38 years (a) Choose the correct hypotheses that can be used to challenge the validity of the calm made by the shareholders' group. Ho! 9 years Ha:

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