What is the difference between a repetition and replication

Repetition is when you make more than once a measurement in a sample.

Replication is when you make a measurement a more than one sample.

Explanation:

For example: I have to determine the average weight of beakers. If I weigh 3 times the same beaker, I am doing repetitions (measurements in the same sample). Whit repetitions I can only stimate the measurement instrument error (in this case the error of the used balance).

If I take 3 beakers and weigh them, I have 3 different weigh measurements. These measurements are replicates (measurements in more than one sample). With replicates I can stimate the experiment error (the error associated to the real weight of the beakers).

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