1.

Question 3 :The class marks of a certain frequencydistribution are 47,52,57,62,67,72,77.30353837​

Answer»

Answer:

5

Step-by-step explanation:

CLASS gaps are, h=52−47=5

⇒ If class marks are REPRESENTED by xi

then class intervals WOULD be

(X 1− 2X,x1+2x ),(x2 − 2x ,x2+2x)

=(44.5,49.5),(49.5,54.4),(54.5,59.5),....

with class size x=5.

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