Category:Censored Observations

This category contains results about Censored Observations.
Definitions specific to this category can be found in Definitions/Censored Observations.

Right Censored

Consider a statistical study which involves times to failure.

Such data may be incomplete, in the sense that some experimental units:

may not have failed by the end of the study

or:

may have been withdrawn or lost before failure.

Such data are said to be right censored.

Left Censored

Consider a statistical study of a disease.

There exists a difficulty if the time of onset is unknown.

This is because it may not be known if the disease is detected only when the patient is examined medically at the point where symptoms of the disease are apparent.

In these circumstances, such data are said to be left censored.