Best practice in statistics: The use of log transformation

The log transformation is often used to reduce skewness of a measurement variable. If, after transformation, the distribution is symmetric, then the Welch t-test might be used to compare groups. If, also, the distribution becomes close to normal, then a reference interval might be determined.

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The log transformation is used to reduce skewness of a measurement variable. If the distribution becomes symmetric, the Welch t-test can be used to compare groups. If the distribution becomes close to normal, a reference interval can be determined.