If error was avoidable, then there's nothing left for future research improvement.
Chat with our AI personalities
It is an error that occurs due to some uncontrollable item such as changes in the weather that can cause temperature changes, or unforeseen genetic expressions that can foul up your results.
Position or speed
An experimental error is is
A theoretical error is an error that is not quite proven, which means that it is also arguably not an error.
Standard error is random error, represented by a standard deviation. Sampling error is systematic error, represented by a bias in the mean.