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You are investigating the stability of stock index returns over a multi-decade horizon. You collect the following information about monthly index returns: Assuming equal variances
You are investigating the stability of stock index returns over a multi-decade horizon. You collect the following information about monthly index returns: Assuming equal variances between periods, calculate the statistic for differences between means, to test the hypothesis that the means are equal. Bonus thinking question: can you reject the equal means hypothesis? Enter answer accurate to 3 decimal places
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