Frequency Table
How to make a frequency table from the given data and solve frequency table problems: examples and their solutions.
Example 1
Make a 3 column table.
In the Interval column,
write the 5 intervals:
from 50-59 to 90-99.
Name the next columns as Tally and Frequency.
Find the values that are in 50-59 interval:
56, 52.
While counting the values,
draw the tally mark 2
in the Tally column.
And write 2 (the number of the data)
in the Frequency column.
Find the values that are in 60-69 interval:
60, 69, 67.
While counting the values,
draw the tally mark 3
in the Tally column.
And write 3
in the Frequency column.
Find the values that are in 70-79 interval:
74, 78, 77, 75, 70, 74, 74.
While counting the values,
draw the tally marks 5 and 2
in the Tally column.
And write 7
in the Frequency column.
Find the values that are in 80-89 interval:
81, 81, 85, 84, 80, 88.
While counting the values,
draw the tally marks 5 and 1
in the Tally column.
And write 6
in the Frequency column.
Find the values that are in 90-99 interval:
91, 97.
While counting the values,
draw the tally mark 2
in the Tally column.
And write 2
in the Frequency column.
So this is the frequency table.
Example 2
The intervals that are less than 80 are
50-59, 60-69, and 70-79.
And the frequencies of the intervals are
2, 3, and 7.
So the number of the values
that is less than 80 is
2 + 3 + 7.
So 12 is the answer.
