10.6 Central tendency and data transformations
Unit 10 · Statistics and inference
Ideas in this lesson
Median of a data set
Order the observations before locating the middle value.
Mode of a data set
Compare frequencies and identify the most frequent observation.
Mean under a linear transformation
Apply a common scale and shift to every observation.
Spread under a linear transformation
A shift preserves spread; multiplication scales the population standard deviation by the absolute factor.
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