p. 397: Wrong numbers in standard error calculation

avehtari / ROS-Examples

Regression and other stories R examples

https://avehtari.github.io/ROS-Examples/

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p. 397: Wrong numbers in standard error calculation #71

Closed mgrabovsky closed 3 years ago

mgrabovsky commented 3 years ago

On the last line on page 397 in the calculation of the standard error of the estimate, there are wrong numbers for the middle two groups in the numerator:

1.5² 1358² + 1.9² 1738² + 2.4² 789² + 2.3² 366²

should be

1.5² 1358² + 1.9² 1820² + 2.4² 837² + 2.3² 366²

The result is also incorrect, it should be 1.04.

avehtari commented 3 years ago

Thanks! Fixed and will be mentioned in the errata.