how to calculate cf in economic f is not given
Answers
The cumulative frequency is calculated by adding each frequency from a frequency distribution table to the sum of its predecessors. The last value will always be equal to the total for all observations, since all frequencies will already have been added to the previous total .
Sort the data set. A "data set" is just the group of numbers you are studying. Sort these values in order from smallest to largest.[1]
Example: Your data set lists the number of books each student has read in the last month. After sorting, this is the data set: 3, 3, 5, 6, 6, 6, 8.
Count the absolute frequency of each value. The frequency of a value is the number of times that value appears. (You can call this the "absolute frequency" when you need to avoid confusion with cumulative frequency.) The easiest way to keep track of it is to start a chart. Write "Value" (or a description of what the value measures) at the beginning of the first column. Write "Frequency" at the top of the second column. Fill out the chart for each value.[2]
Example: Write "Number of Books" at the top of the first column. Write "Frequency" at the top of the second column.
In the second row, write the first value under Number of Books: 3.
Count the number of 3s in your data set. Since there are two 3s, write 2 underneath Frequency on the same row.
Repeat for each value until you have the full chart:
3 | F = 2
5 | F = 1
6 | F = 3
8 | F = 1