Exclusive Series
The series with class intervals, in which all the items having the range from the lower limit to the value just below its upper limit are included, is known as the Exclusive Series. This kind of frequency distribution is known as an exclusive series because the frequencies corresponding to the specific class interval do not include the value of its upper limit. For example, if a class interval is 0-10, and the values of the given series are 4, 10, 2, 15, 8, and 9, then only 4, 2, 8, and 9 will be included in the 0-10 class interval. 10 and 15 will be included in the next class interval, i.e., 10-20. Also, the upper limit of a class interval is the lower limit of the next class interval.
Example of Frequency Distribution in Exclusive Series
From the above table of exclusive series, it can be seen that the upper limits of the first class interval is the lower limit of the second class interval, and so on. Also, as discussed above, if the data includes a value 10, it will be included in the class interval 10-20, not in 0-10.
Types of Frequency Distribution
It is not always possible for an investigator to easily measure the items of a series or set of data. To make the data simple and easy to read and analyze, the items of the series are placed within a range of values or limits. In other words, the given raw set of data is categorized into different classes with a range, known as Class Intervals. Every item of the given series is put against a class interval with the help of tally bars. The number of items occurring in the specific range or class interval is shown under Frequency against that particular class range to which the item belongs.
Table of Content
- Example of Frequency Distribution
- Types of Frequency Distribution
- 1. Exclusive Series
- 2. Inclusive Series
- 3. Open End Series
- 4. Cumulative Frequency Series
- 5. Mid-Value Frequency Series
- 6. Equal and Unequal Class Interval Series
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