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Variable and It's Measurement PDF Print E-mail
Monday, 11 August 2008 23:14

Tags: measurement | statistics | variable

RIFAT AFROZE

Variables: By variable we mean the characteristics which can be measured numerically and the value of which varies from individuals to individuals, item to item. It can also call as Quantitative Variable. Example: For human beings height, weight, number of siblings, sex, and marital status are all example of variables.

The characteristic which can be measured but not expressed numerically and which indicates a difference in the quality of the phenomenon is known as an attribute. It can also define as Qualitative Variable. Example: Efficiency (Efficient/inefficient), gender, eye color are attributes.
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Measures of Central Tendency PDF Print E-mail
Saturday, 09 August 2008 13:49

Tags: central tendency | mean | median | mode

According to Professor Bowley, averages are “statistical constants which enable us to comprehend in a single effort the significance of the whole.” They give us an idea about the concentration of the values in the central part of the distribution. Plainly speaking, an average of a statistical series is the value of the variable which is representative of the centric distribution. The following are three measures of central tendency that are in common use:

i) Arithmetic Mean or simply Mean,
ii) Median, and
iii) Mode
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