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QUESTION 3 For the data below, I want to determine if the mean age is less than 30? My t critical (alpha=0.05) is Subject

QUESTION 3 For the data below, I want to determine if the mean age is less than 30? My t critical (alpha=0.05) is Subject Age 1 21 21 26 3 28 4 31 19 (to three decimal places)?

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