Please solve q no 2
Q 2 C a c l u l a t e     s tan d a r d   d e v i a t i o n   f o r   t h e   f o l l o w i n g     d a t a :
C.I F
0-10 5
10-20 10
20-30 20
30-40 40
40-50 30
50-60 20
60-70 10
70-80 4
 

Dear Student,

standard deviation is equal to (x-x¯)ff
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