DISTANCE LEARNING

Teacher's mail id : joycyarmstrong@gmail.com





















































































Frequency and Frequency Tables

The frequency of a particular data value is the number of times the data value occurs.
For example, if four students have a score of 80 in mathematics, and then the score of 80 is said to have a frequency of 4.  The frequency of a data value is often represented by f.

frequency table is constructed by arranging collected data values in ascending order with their corresponding frequencies.

The marks awarded for an assignment for class 7 of 20 students were as follows:
     6     7     5     7     7     8     7     6     9     7
     4     10   6     8     8     9     5     6     4     8
Present this information in a frequency table.
Solution:
To construct a frequency table, we proceed as follows:
Step 1:
Construct a table with three columns.  The first column shows what is being arranged in ascending order (i.e. the marks).  The lowest mark is 4.  So, start from 4 in the first column as shown below.
Step 2:
Go through the list of marks.  The first mark in the list is 6, so put a tally mark against 6 in the second column.  The second mark in the list is 7, so put a tally mark against 7 in the second column.  The third mark in the list is 5, so put a tally mark against 5 in the third column as shown below.
We continue this process until all marks in the list are tallied.
Step 3:
Count the number of tally marks for each mark and write it in third column.  The finished frequency table is as follows:

Final assessment:
1) Construct the frequency table for the given data.
4, 3, 6, 5, 2, 4, 3, 3, 6, 4, 2, 3, 2, 2, 3, 3, 4, 5, 6, 4, 2, 3, 4
2) The pupils in Mr. Middleton's class take a Math test and get scores out of 10, which are listed below:
37625910871
8435678765
construct a frequency table.
























































































































































No comments:

Post a Comment