Notes 3-6

This document discusses scale changes of data. It provides examples of scaling data by multiplying each data point by a scale factor. The key effects of scaling data are: 1. Each measure of center (mean, median) is multiplied by the scale factor. 2. Variance is multiplied by the square of the scale factor. 3. Standard deviation and range are multiplied by the scale factor. Scaling data in this way allows conversion between different units of measurement, such as converting miles to kilometers by multiplying by 1.61.