Akm Saiful Islam. WFM 5201: Data Management and Statistical Analysis. Lecture-1: Descriptive Statistics [Measures of central tendency]. Institute of Water and Flood Management (IWFM) Bangladesh University of Engineering and Technology (BUET). April, 2008. Descriptive Statistics.
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Lecture-1: Descriptive Statistics
[Measures of central tendency]
Institute of Water and Flood Management (IWFM)
Bangladesh University of Engineering and Technology (BUET)
their arithmetic mean, denoted by , can be expressed as:
are the corresponding frequencies, where the subscript ‘k’ stands for the number of classes, then the mean is
If “n” is Even
If “n” is odd
The weekly pocket money for 9 first year pupils was found to be:
3 , 12 , 4 , 6 , 1 , 4 , 2 , 5 , 8
modal class and class before it
modal class and class after
class and class before modal class
class after modal class