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Two samples, one of size 31 and the second of size 30, are selected to test the difference between two independent population means. How
Two samples, one of size 31 and the second of size 30, are selected to test the difference between two independent population means. How many degrees of freedom are used to find the critical value? Assume the population standard deviations are unknown but equal. Multiple Choice 59 31 60 60 61
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