When the degrees of freedom are greater than 40,the normal approximation of the sampling distribution of the mean is quite good.

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Quizplus · Accepted Answer

The normal approximation of the sampling distribution of the mean is considered acceptable when the sample size is sufficiently large, typically when the degrees of freedom are greater than 30 or 40. Therefore, when the degrees of freedom are greater than 40, the normal approximation is quite good.

When the Degrees of Freedom Are Greater Than 40,the Normal