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index 6c6240f..623302e 100644
--- a/README.md
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@@ -1,7 +1,7 @@
 # regtools
 Various tools for linear, nonlinear and nonparametric regression.
 
-These are associated with a book I'm writing on regressio; as I make
+These are associated with a book I'm writing on regression; as I make
 more and more progress on the book, there will be more and more
 functions in this regtools package.