Define the following terms :
(i) Observations
(ii) Raw data
(iii) Fequency of an observation
(iv) Frequency distribution
(v) Discrete frequency distribution
(vi) Grouped frequency distribution
(vii) Class-interval
(viii) Class-size
(ix) Class limits
(x) True class limits
Data obtains by the observer from the given problem is called observations.
Data collected in its original form is called Raw Data.
(iii) Fequency of an observation:-
Number of times a certain value occurs is termed as frequency.
Organisation of Raw data in tabular form is called Frequency Distribution.
(v) Discrete frequency distribution:-
Frequency Distribution in which Raw Data is ungrouped is called Discrete frequency distribution.
(vi) Grouped frequency distribution:-
A frequency Distribution in which Raw data is grouped in specific class.
Class interval is a group under which large number of data is grouped to analyze its Range and Distribution.
Class –size is defined as the difference between upper and lower boundaries of any class.
Class limits works as separation of one class in a grouped frequency distribution from another.
The Exact class limits of frequency distribution are called True class limits.
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