I discuss confidence intervals for the mean of Y and prediction intervals for a single value of Y for a given value of X in simple linear regression. I discuss the form of the confidence interval for the mean and prediction interval for a single value and their standard errors.

The data used is estimated from a figure in:

Singer et al. (2004). Empathy for pain involves the affective but not sensory components of pain. Science, 303:1157--1162.

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