Explain the meaning of the following terms:
(i) Variable
(ii) Class-interval
(iii) Class-size
(iv) Class-mark
(v) Frequency
(vi) Class limits
(vii) True class limits
Answers
Explained the meaning of the following terms:
Step-by-step explanation:
(i) Variable - which can take any value
(ii) Class interval : Each group into which the raw data is grouped is called class interval .
(iii) Class size: The difference between the upper limit and the lower limit of a class
(iv) Class mark of a class: (Upper limit+Lower limit)/2
(v) Frequency : number of data values that fall in the range specified in that class.
(vi) Class limit: upper value and lower value of Class interval
(vii) True class limits: In the exclusive form, the upper and lower limits of a class are respectively known as true upper limit and true lower limit.
In the inclusive form of frequency distribution, the true lower limit of a class is obtained by getting mean of upper limit of preceding class & lower limit of current class
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