Question

[Ans. X = 6]
Calculate the arithmetic mean from the following:
2010 dois
X:
-40 to -30
-30 to 20
-20 to -10
-10 to 0
0 to 10
10 to 20
20 to 30
fi
10
28
30
42
65
180
10​

Answer 1

Answer:

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