March 2024
Intermediate to advanced
610 pages
24h 12m
English
Content preview from Introduction to the New Statistics, 2nd Edition
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12 Regression
In Chapter 11 we saw that correlation is a measure of the relationship between X and Y. Like correlation, regression is based on a data set of (X, Y) pairs, but it’s different from correlation in that it gives an estimate of Y for a value of X that we choose. So correlation is a number that summarizes, overall, how X and Y relate, whereas regression takes a chosen single value of X and provides an estimate of Y for that X. Recall that Figure 11.1 was a scatterplot of Well-being (the Y variable) and Body Satisfaction (the X variable), for 106 college students. Figure 11.24 showed the separate scatterplots for women and men. Suppose Daniel scores X = 3.0 for Body Satisfaction: What Well-being score ...
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