A:t distribution with 73 degrees of freedom B: t distribution with 72 degrees of freedom. C:t distribution with 71 degre

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A:t distribution with 73 degrees of freedom B: t distribution with 72 degrees of freedom. C:t distribution with 71 degrees of freedom D: t distribution with 70 degrees of freedom. 答案: t distribution with 70 degrees of freedom.则可以输入：体育对大学人才培养社会职能并点击图示搜索框