Differences

This shows you the differences between two versions of the page.

--- multiple_regression [2019/05/21 22:41] – [Why overall model is significant while IVs are not?] hkimscil
+++ multiple_regression [2019/05/23 10:20] – [Why overall model is significant while IVs are not?] hkimscil
@@ Line 330: / Line 330: @@
 ====== Why overall model is significant while IVs are not? ======
 see https://www.researchgate.net/post/Why_is_the_Multiple_regression_model_not_significant_while_simple_regression_for_the_same_variables_is_significant
+<code>
+RSS = 3:10 #Right shoe size
+LSS = rnorm(RSS, RSS, 0.1) #Left shoe size - similar to RSS
+cor(LSS, RSS) #correlation ~ 0.99
+weights = 120 + rnorm(RSS, 10*RSS, 10)
+##Fit a joint model
+m = lm(weights ~ LSS + RSS)
+##F-value is very small, but neither LSS or RSS are significant
+summary(m)
+</code>
 <code>> RSS = 3:10 #Right shoe size