measurement error
observation error

"You are not positive the difference is real rather than a measurement error."

The difference in temperature is about the same as or less than the measurement error, isn't it?

That's the nature of large numbers - there is inherent measurement error.

In addition, your thermometer has measurement error that must be considered.

There are two main sources of measurement error which reduce reliability.

Consequently, power can often be improved by reducing the measurement error in the data.

These combined increased the chance and amount of measurement error for such responders.

They can also eliminate measurement errors caused by ground loops.

Measurement error and statistical uncertainty are also present in all measurements.

To account for measurement errors on individual runs, the benchmark was run three times each and the results were averaged.