Different temperature measuring

Hello Forum members,

I just finished a program for logging temperature with an Arduino Uno. I used a thermistor and a NTC (MCP9701) and I notice that there is a difference between them of 2.5 degrees Celcius. I know that the accuracy of the MCP9701 is about 4 degrees, so that 2.5 is within that range.
Is it possible to adjust the output by adding a value, or is that the wrong way to make a correction?

Joop

If you have a trusted reference - I'd have thought that they would both be pretty linear so just adding/subtracting a value as required should work fine.