Which of the following techniques is premised by a relatively small number of causes resulting in the majority of defects?

The law of averages is a layperson's term for the belief that future events will balance out past events, which is not a specific quality management technique related to defect causes.

Six Sigma is a comprehensive methodology and set of tools for process improvement and defect reduction, but it is not itself the specific technique premised on a "small number of causes resulting in the majority of defects." Pareto analysis is often a tool used within Six Sigma.

Pareto analysis, also known as the 80/20 rule or Pareto principle, asserts that roughly 80% of effects come from 20% of causes. This technique is specifically designed to identify the vital few causes that contribute to the majority of defects, allowing project managers to prioritize their efforts for maximum impact. By focusing on these few critical causes, significant improvements in quality and defect reduction can be achieved.

An Ishikawa diagram, or fishbone diagram, is a cause-and-effect diagram used to identify all possible causes of a problem, but it does not inherently prioritize or identify that a small number of these causes are responsible for the majority of defects.