Answer :

Given, Marks obtained by two students in 10 tests are given in Table.

To Find: Who is more intelligent and who is more consistent?


Explanation: Marks obtained by Ravi


Mean,



SD ()=


SD ()=


SD ()=


SD ()=13.003


Coefficient of variation =


Cv =


For Hashima


Mean,



SD ()=


SD ()=


SD ()=


SD ()=25.16


Coefficient of variation =


Cv =


Since, The coefficient of variation in mark obtained by Hashima is greater than the coefficient of Variation in mark obtained by Ravi,


Hence, Hasima is more consistent and intelligent


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