linr, logr

1 files changed, 23 insertions, 0 deletions

diff --git a/R_LinR/aaaaaa.md b/R_LinR/aaaaaa.md
new file mode 100644
index 0000000..8ad7cd1
--- /dev/null
+++ b/R_LinR/aaaaaa.md
@@ -0,0 +1,23 @@
+t-value estimate / std_error
+
+R^2 = 1 - SS_{res}/SS_{tot}
+
+SS_{rss} = sum((y_i - y_pred)^2) # residual sum of squares
+SS_{tot} = sum((y_i - y_mean)^2)
+
+
+F = ((SS_{tot} - SS_{res})/p)/(SS_{res}/(n-p-1))
+n - number of points
+p - number of inputs
+
+# https://www.rose-hulman.edu/class/ma/inlow/Math485/ftests.pdf
+
+
+
+p-value -> 0 high significance
+
+adjusted R^2 = 1 - (1-R^2)(n-1)/(n-p-1)  - it adjusts the r-squared value by penalizing the inclusion of irrelevant, by which we mean highly collinear, variables. It does this by taking into account both the number of predictors and the sample size.
+
+
+
+https://mjt.cs.illinois.edu/ml/lec2.pdf
\ No newline at end of file