changed the grading page

06_StatisticalInference/grading.md

@@ -1,17 +1,13 @@
 ## Grading and logistics
 
-The grading in this class is very easy. 
-
-There are four quizzes, each containing in the neighborhood of 10 questions.
-
-Each question is equally weighted. 
-
-Your total points is the sum of the questions across all quizzes that
-you answered correctly (using all of your quiz attempts).
-
-70% or more of the total points is a pass for the class. 
-
-80% or more of the total points is a pass with distinction.
+The grading in this class is very straightforward. 
+
+1. There are four quizzes, each containing in the neighborhood of 10 questions.
+2. Each question is equally weighted as 1 point.
+3. Some require two answers, each giving half of a point (for a maximum total of 1 point for those questions).
+4. Your total points is the sum of the points questions across all quizzes that you answered correctly (using all of your quiz attempts).
+5. 70% or more of the total points is a pass for the class. 
+6. 80% or more of the total points is a pass with distinction.