Which Collection Tube Is Used for Enumeration of Leukocyte Subpopulations

question 10

Multiple Choice

Which collection tube is used for enumeration of leukocyte subpopulations for blood and bone marrow?

• A) EDTA tube (purple)
• B) Heparinized tube (green)
• C) Sodium citrate tube (blue)
• D) Red top tube

---

Definitions:

Symmetry

A characteristic of shapes or patterns that exhibit proportionate similarity between parts, often mirrored around a central axis.

Coefficient Of Skewness

A statistical measure that quantifies the asymmetry of a distribution around its mean, indicating if the distribution leans to the left or right.

Skewness

A measure of the asymmetry of the probability distribution of a real-valued random variable, indicating how much the distribution leans to one side of the mean.

Positively Skewed

Describes a distribution of data where the tail on the right side of the histogram is longer or fatter than the left side, indicating that the majority of the data points are clustered to the left.