diff --git a/education/statistics/Measurement Error.md b/education/statistics/Measurement Error.md
index 7e031b8..840e6fb 100644
--- a/education/statistics/Measurement Error.md	
+++ b/education/statistics/Measurement Error.md	
@@ -1,4 +1,8 @@
 (Chapter 6, STAT 1040)
 
 # Bias v. Chance Error
-Bias affects all measurements the same way, making them all too large or too small. 
\ No newline at end of file
+## Bias
+Bias *affects all measurements the same way, making them all too large or too small*. Bias is detected by comparing to an external standard.
+## Chance error
+Chance errors *change from measurement to measurement but average out over time*. There is no way to remove all chance errors from a measuring process. An example of chance error would be starting a stopwatch then attempting to stop it at exactly 5 seconds, then repeating. The times will vary, but each measurement will vary in a different way.
+