In a Stratum Chart, the Vertical Distance Between Two Lines

question 21

Multiple Choice

In a stratum chart, the vertical distance between two lines represents the

• A) amount of the upper line variable.
• B) amount of the lower line variable.
• C) sum of the upper and lower line variables.
• D) difference of the upper and lower line variables.
• E) None of the above.

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Definitions:

Preexisting

Already existing before a specified point in time or before an analysis, event, or assessment.

Amniocentesis

A medical procedure used in prenatal diagnosis where a small amount of amniotic fluid is sampled from the amniotic sac around a developing fetus.

Karyotype

The number and visual appearance of the chromosomes in the cell nuclei of an organism or species.

Chorionic Villus Sampling

A prenatal test in which a sample of chorionic villi from the placenta is taken to test for genetic abnormalities in the fetus.