Mean

=__Calculation of Mean__ = =__Applications of Mean__ =

//[1]// //See “Notes on Standard Deviation ” [2] Whether Likert-tpe scales are interval-level or ordered-categorical is still a subject of disagreement. Here, it is treated as interval scale, much like our MSG scores although the range of marks of each interval is the same (5 marks) for the assigned grades of 2 to 8 but different for the top and bottom range of marks where 1 is assigned for ≥ 75 marks and 9 is assigned for less than 40 marks, and zero score has meaning! If treated as ordinal scale, then the mode or median is a better measure.//