Calculate the arithmetic mean for the following data :
Class interval :- 10-20/10-30/30-40/40-50/50-60/60-70/70-80/80-90/90-100
frequency :- 2,7,17,29,29,10,3,2,1 find the mean?
Answers
Answer:
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Answer:
Explanation:
Answer
class interval frequency (f) mean value (x) fx
0 - 10 7 5 35
10 - 20 14 15 210
20 - 30 28 25 700
30 - 40 26 35 910
40 - 50 19 45 720
50 - 60 9 55 495
Sum 100 30 70
A.M.= ∑f i
∑f i x i
= 100
/3070 =30.7