1-Types of Frequency Series; Frequency, Class freq, Tally Bars; Frequency Array (OR Discrete Series)
Learning Outcomes:- Through
this module, you will gain understanding on:- 1.
Frequency
series (With frequencies) 2.a
Frequency Array (OR Discrete Series) 2.b Frequency Distribution (OR Series with Class Intervals) 2.
Meaning of some important terms - Frequency, Class frequency, Tally
Bars 3.
Frequency Array (OR Discrete Series) - example, drawbacks 4.
Frequency Distribution - features 5.
Relative frequency 6.
Diff b/w Frequency Distribution AND Frequency Array 7.
Size of Class Interval 8.
important terms - class, class interval, magnitude of CI, mid value of
CI |
Reference list
entries:
1. https://www.enchantedlearning.com/math/tally/tallytable2.GIF
2. https://byjus.com/maths/tally-marks/
2.
Frequency series (With frequencies)
2.a Frequency Array (OR Discrete Series)
2.b Frequency Distribution (OR Series with Class
Intervals)
Meaning
of some important terms -
Frequency
●
Number of times
an item occurs or repeat itself in series
●
Eg. 4 students
have secured 10 marks
Frequency of 10 is 4
Class frequency
●
Number of times
an item repeats itself corresponding to a class interval (range of value)
●
Eg. There are
four students securing marks between 10-15
4 Is the frequency corresponding to the class interval
10-15
Tally Bars
●
Every time an
item occurs, a Tally Bar (|) is marked against it
●
Two Tally Bars
would mean that the concerned item has occurred twice in the series
● After every four Tallies, the fifth Tally will cross out all the previous four tallies, thus, making a group of five
●
This method of
marking and counting is known as four and cross method
2.a
Frequency Array (OR Discrete Series)
●
Exact
measurements of data items are clearly shown
●
No class
intervals
●
Items of series
are arranged in ascending or descending order
● Frequencies are noted in front of each item
Meaning of some important terms - Frequency, Class frequency, Tally Bars, Frequency Array (OR Discrete Series) - example, drawbacks, Frequency Distribution – features, Relative frequency, Difference between Frequency Distribution AND Frequency Array, Size of Class Interval, important terms - class, class interval, magnitude of CI, mid value of CI | Classification of Data | 11th Commerce | by @statomics11comm
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