The most appropriate method to decrease the random errors in a measurement is to take the average of more measurements. Because as the number of data increases the certainty of the values also increases. Being more certain with the value means decreased chance of random errors.

Taking fewer measurements decreases the certainty of the collected data, thereby increasing the chance of more random errors.

Clabritaing the instrument is also a strategy to reduce the errors in a measurement. But calibrations mainly contribute to precise measurements. It has nothing to do with random errors that are a result of carelessness, more correctly personal errors.

Taking fewer measurements decreases the certainty of the collected data, thereby increasing the chance of more random errors.

Clabritaing the instrument is also a strategy to reduce the errors in a measurement. But calibrations mainly contribute to precise measurements. It has nothing to do with random errors that are a result of carelessness, more correctly personal errors.