Intelligence is the capacity to suppose rationally, study effectively, apprehend complicated ideas, and adapt to the environment. Accordingly, intelligence is quality visible as a preferred capacity which could have an impact on overall performance on a huge variety of cognitive tasks. IQ (the Intelligence Quotient) is the quantification of an individual’s intelligence relative to friends of a comparable age. This have a look at affords knowledge of take a look at of importance distinction among the 2 approach and its utility in IQ tiers from the chosen place in Thanjavur District, Tamilnadu. This case study helps, how to investigate the data by using test of significance difference between two means, what are the assumptions, conditions for application of this test. This have a look at might display the utility of t-test in IQ levels of male and female of the age group of 20 and 30 in Thanjavur district. This additionally consists of how the facts turned into collected, how it’s changed to IQ tiers and the way it turned into calculated in t-test. Also, this study would provide a simple knowledge for the utility of Student t-test using SPSS software.