« previous next »

Author Question: What does the CV calculated in Question 2 describe about the white cell counts? a. Accuracy b. ... (Read 104 times)

hbsimmons88

  • Hero Member
  • *****
  • Posts: 526
on: Jun 25, 2018
What does the CV calculated in Question 2 describe about the white cell counts?
 
  a. Accuracy
  b. Reliability
  c. Proper calibration
  d. Precision

Question 2

A patient's white blood cells (WBCs) are counted on an automated cell counter 10 times. The mean white count is 8000/mL, and the standard deviation (SD) is 300. What is the coefficient of variation (CV)?
 
  a. 0.04
  b. 2.6
  c. 3.8
  d. 26


amy.lauersdorf90

  • Sr. Member
  • ****
  • Posts: 327
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: D
The CV is a measure of precision or how well a result can be reproduced. It allows comparisons of assays with different means and is a unitless number, although usually expressed as a percentage. Accuracy is how close a result is to the true value; proper calibration is required to obtain accuracy. Reliability is how well a method holds both accuracy and precision over time.

Answer to Question 2

ANS: C
 CV = (SD/mean)  100 = (300/8000)  100 = 3.8


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

White English Bulldog White English Bulldog
(A) The structure of a neuron, showing the dendrites, nerve cell body, and axon. (B) Photomicrograph (A) The structure of a neuron, showing the dendrites, nerve cell body, and axon. (B) Photomicrograph
Cell Weapon Cell Weapon
Biology Question to try Biology Question to try
economic question economic question
economic question economic question
Video: Hip Animation

For a complete list of videos, visit our video library