Complete the table. Class intervals Length of intervals Mid-values Class Limits Class Boundaries Lower Upper Lower Upper 20 - 24 25 - 29 30 - 34 35 - 39 40 - 44 45 - 49

The difference between the lower limits (or upper limits) of any two consecutive class intervals is called the length of the class interval. The average of the upper and lower limits of a class interval is called its mid-value of the class interval. The endpoints of a class interval are called its class limits. The average of the upper-class limit of a class interval and the lower class limit of the next higher class interval is called the class boundary. Class intervals Length of intervals Mid-values Class Limits Class Boundaries Lower Upper Lower Upper 20 - 24 5 22 20 24 19 . 5 24 . 5 25 - 29 5 27 25 29 24 . 5 29 . 5 30 - 34 5 32 30 34 29 . 5 34 . 5 35 - 39 5 37 35 39 34 . 5 39 . 5 40 - 44 5 42 40 44 39 . 5 44 . 5 45 - 49 5 47 45 49 44 . 5 49 . 5

E M B I B E

ICSE Skills In Mathematics>Chapter 33 - Statistics>MASTERY TEST-7>Q 7

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8th ICSE

IMPORTANT

Earn 100

Calculate the mean.

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Important Questions on Statistics

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8th ICSE

IMPORTANT

ICSE Skills In Mathematics>Chapter 33 - Statistics>MASTERY TEST-7>Q 8

Complete the table.

Class intervals	Length of intervals	Mid-values	Class Limits		Class Boundaries
Class intervals	Length of intervals	Mid-values	Lower	Upper	Lower	Upper
$20 - 24$
$25 - 29$
$30 - 34$
$35 - 39$
$40 - 44$
$45 - 49$