Explain the meaning of class-mark.

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Solution

Class mark meaning:
Class mark is the mid-value of the class interval.
Class mark $= \frac{L o w e r l i m i t + U p p e r l i m i t}{2}$
For example: class mark of class interval $10 - 15$ is $\frac{10 + 15}{2} = 12.5$
Hence, class mark is $\frac{L o w e r l i m i t + U p p e r l i m i t}{2}$ .

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Q. Explain the meaning of the following terms:

(i) variate

(ii) class-integral

(iii) class-size

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(v) frequency

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(vii) true class limits.

Explain the meaning of each of the following terms.
(i) Variate
(ii) Class interval
(iii) Class size
(iv) Class mark
(v) Class limint
(vi) True class limits
(vii) Frequency of a class
(viii) Cumulative frequency of a class

Q. Explain the meaning of each of the following terms:
(i) Variate
(ii) Class interval
(iii) Class size
(iv) Class mark
(v) Class limit
(vi) True class limits

Explain the meaning of class interval.

Explain the meaning of class size.

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Explain the meaning of class-mark.

Class mark meaning:Class mark is the mid-value of the class interval.Class mark =Lowerlimit+Upperlimit2For example: class mark of class interval10-15 is 10+152=12.5Hence, class mark is Lowerlimit+Upperlimit2.

Class mark meaning:
Class mark is the mid-value of the class interval.
Class mark $= \frac{L o w e r l i m i t + U p p e r l i m i t}{2}$
For example: class mark of class interval $10 - 15$ is $\frac{10 + 15}{2} = 12.5$
Hence, class mark is $\frac{L o w e r l i m i t + U p p e r l i m i t}{2}$ .