There are 2 common procedures to reduce sample size called coning and quartering and riffling. Which of the following statements about these procedures are false?

Both methods essentially involved dividing the samples randomly and saving a portion of the sample.

Coning and quartering is the easiest method when a sample is very large.

Riffling involves a mechanical device that separates a sample into 2 portions.

It is never recommended to reduce a sample to a smaller size.