Ratio Scale

[Ajay Kumar]

Which of the following variables has (have) ratio scale of measurement?

 Temperature in Kelvin

 Temperature in Centigrade

 Year

 Angle measured in degrees.

Why is temperature in kelvin in ratio scale of measurement and why not Temp in Centigrade  not in Ratio scale of Measurement??

How is that possible

Please explain.

Thanks

[Statistics 1 Support 2]

Because temperature in kelvin possess the property of absolute zero.

Thanks,

Ankur Upadhyay

Course Support Member

[Ajay Kumar]

You mean minimum value in the Temp in Kelvin is 0 degree Kelvin and minimum value in celcius is -273 degree celcius?

Correct me if I am wrong.

[Statistics 1 Support 2]

Concept of absolute zero is that when you say something possess the property of absolute zero that means absence of that particular attribute or property at zero.

[Ajay Kumar]

Sorry to say this, I am not getting the intuition behind it. Please could you elaborate.

My understanding is there is no negative values when In case of Ratio scale of measurement.

example height, weight starts from 0 onwards.

In case the Kelvin scale , there is an absolute 0 at 0 degree's kelvin.

But when in case of Celcius, it can go towards negative values also. So it is in interval scale.

Please correct me if i am wrong.

[Vishal T]

The concept of absolute zero is that,

well...let us take the example of the Celcius scale...

when you say that the temperature outside your house is 0-degree Celcius, you're not actually mentioning the "absolute zero".

The point I'm trying to make here is when it's 0-degree Celcius outside, it does not

mean that there is an 'absence of temperature'. It is still cold out there and the statement does not imply there is an absence of the property(In this case, temperature).

whereas when you take the weight as an example,

0 kg means "absolute zero" because there is an absence in the property(In this case 'weight').

Hope this helped!

[Ajay Kumar]

Thank you Vishal.