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Define: class-boundary , lower and up...

Define:
class-boundary , lower and upper class boundaries

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Define: class-length

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The class-mark and class-length of a class-interval are 22 and 10 respectively.Find its lower and upper class-boundaries.

Define: lower-class limit and upper class-limit

Determine the third class-interval of the classes 10-19,20-29,……………and find its lower and upper class-boundaries.

Find the lower class-boundary of the continuous frequency distribution of which the mid-value is m and the upper class-boundary is u.

The class-mark of a class interval of a frequency distribution is m and its class-length is l. Find its lower and upper class-limits.

The mid-value of a class-interval of a continuous frequency distribution is 42 and its class-length is 10.Find the lower and upper class-limits of the class-intervals.