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Calculate the upper and lower bounds of an interval

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The life span at birth of humans has a mean of 87.71 years and a standard deviation of 19.58 years. Calculate the upper and lower bounds of an interval containing 95% of the sample mean life spans at birth based on samples of 150 people. Give your answers to 2 decimal places.

a) Upper bound =  _____years

b) Lower bound =  _____years

Reference no: EM132464611

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