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