--- a/statistics/questions.rst	Thu Oct 21 18:22:07 2010 +0530
+++ b/statistics/questions.rst	Tue Oct 26 15:44:09 2010 +0530
@@ -8,15 +8,13 @@
    sum
 
 2. Calcutate the mean of the given list?
-   
    student_marks=[74,78,56,87,91,82]
    
    mean(student_marks) 
 
 
-3. Given a two dimensional list,::
+3. Given a two dimensional list,
    two_dimensional_list=[[3,5,8,2,1],[4,3,6,2,1]]
-   
    how do we calculate the mean  of each row?
    
 
@@ -27,7 +25,6 @@
    std
 
 5. Calcutate the median of the given list?
-   
    student_marks=[74,78,56,87,91,82]
 
    median(age_list)
@@ -50,5 +47,10 @@
 
 .. A minimum of 2 questions here (along with answers)
 
-1. Question 1
-2. Question 2
+1. Get the weighted mean of [74,64,86,76,83] where the weights are 
+   [2,2,1,4,4] respectively.
+
+   Hint: Readup on function average using average?
+
+2. Calculate the weighted standard deviation for the sequence [74,64,86,76,83], such that the weights are [2,2,1,4,4] .
+