What is the meaning of Classmark and Prepare a Discrete Frequency Distribution Important PointsThe word data means information. Statistical data are of two types : (i) Primary data (ii) Secondary data When an investigator collects data himself with a definite plan or design in his (her) mind, it is called Primary data. Data which are not originally collected … [Read more...] about What is the meaning of Classmark and Prepare a Discrete Frequency Distribution

# Cumulative Frequency

## What is Cumulative Frequency in statistics

What is Cumulative Frequency in statisticsIf the frequency of first class interval is added to the frequency of second class and this sum is added to third class and so on then frequencies so obtained are known as Cumulative Frequency (c.f.). There are two types of cumulative frequencies (a) less than, (b) greater than A table which displays the manner in which … [Read more...] about What is Cumulative Frequency in statistics