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The mid-values of the class-intervals of...

The mid-values of the class-intervals of a frequency distribution are respectively 11,14,17,20…… The class interval of which the mid-value is 17 is

A

`15.5-18.5`

B

`14.5-19.5`

C

`12.5-21.5`

D

`11.5-22.5`

Text Solution

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The correct Answer is:
A
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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.

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Knowledge Check

  • The mid-values of the class-intervals of a frequency distribution are respectively 15,20,25,30,…… The class interval of which the mid-value is 20 is

    A
    `12.5-17.5`
    B
    `17.5-22.5`
    C
    `18.5-21.5`
    D
    `19.5-20.5`

  • The mid-value of a class-interval of a frequency distribution is 10 and the class-length of each class is 6, The lower class limit of the class-interval is

    A
    6
    B
    7
    C
    8
    D
    12

  • The mid-value of a class-interval of a frequency distribution is x and its lower -boundary is y. Then its upper -boundary=

    A
    2x
    B
    `2y-x`
    C
    `2x+y`
    D
    `2x-y`

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