#### Explain the meaning of the following terms :

(i) variate

(ii) class size

(iii) class mark

(iv) class limits

(v) true class limits

(vi) frequency of a class

(vii) cumulative frequency of a class.

**Solution:**

**(i) Variant:** A particular value of a variable is called variate.

**(ii) Class size:** The difference between the actual upper limit and the actual lower limit of a class is called its class size.

**(iii) Class mark:** The class mark of a class is the value midway between its actual lower limit and actual upper limit.

**(iv) Class limits:** In the frequency table the class interval is called class limits.

**(v) True class limits:** In a continuous distribution, the class limits are called true or actual class limits.

**(vi) Frequency of a class:** The number of tally marks opposite to a variate is its frequency and it is written in the next column opposite to tally marks of the variate.

**(vii) Cumulative frequency of a class:** The sum of frequency of all previous classes and that particular class is called the cumulative frequency of the class.

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