STATS AND PROB

• data management is the practice of collecting, keeping, and using data securely, efficiently, and cost-effectively
• DIFFERENT WAYS OF GATHERING DATA

  • interview method

  • questionnaire method

  • document method

  • observation method

  • experiment method
• interview method - is the method by which is obtained through oral exchange of questions and answer by the researcher and the respondents
• questionnaire method - is the method where a set of questions is provided by the researcher and the data is provided by the respondents
• document method - is the method where a researcher avails information gathered and stored by individual institutions, whether private or government, made available to others researchers
• observation method - is the method where data is acquired and recorded through direct observation by the researcher on actual situation. it is relatively inexpensive
• experiment method - is the method where data is also gathered by the researcher himself just like the observation method. however, the researcher is allowed to make manipulations
• DIFFERENT WAYS PRESENTING DATA GATHERED

  • textual form

  • graphical form

  • tabular form

  • class interval

  • class size

  • range

  • tally marks

  • frequency
• textual form - is where data is exposed through printed or spoken words, such as through printed or oral media
• graphical form - is where data is organized and presented through the use of various kind of graphs
• tabular form - where data is arrayed in rows and columns
• class interval - refers to the numerical width of any class in a particular distribution
• class size - is the difference between the upper class limit and the lower class limit
• range - the smallest and largest data values that can belong to each class
• tally marks - the representation of the data in the form of vertical lines
• frequency - is the number of times a data values occurs