Shipley developed a NEW test to measure IQ. Using his test, someone with an IQ of 180 would be considered twice as intelligent as someone with an IQ of 90 and someone with an IQ of 90 was three times as intelligent as someone with an IQ of 30. Shipley's test treats IQ as a(n):.

ratio variable

Explanation: Ratio variable could be described as a sort of interval variable which could be used on numerical and continuous variables.

However, in ratio variable, a value of zero means there is none of such variable. Additionally multiplication and division of between the variables can be used to make comparison about how much of a certain variable Can be found in another.

In the scenario above, someone with IQ of 180 will be considered as being twice as intelligent as one with IQ of 90,that is 180/90 = 2

And also, someone with IQ of 270 will the considered thrice as intelligent as one with IQ of 90,that is 270/90 =3

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