« previous next »

Author Question: What does the CV calculated in Question 2 describe about the white cell counts? a. Accuracy b. ... (Read 93 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?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

The cell membrane, cytoplasm, nucleus, and nucleolus. The cell membrane, cytoplasm, nucleus, and nucleolus.
Answer to Chem Question Answer to Chem Question
economic question economic question
economic question economic question
economic question economic question
A dendritic cell preparing to engulf spores of a fungus, Aspergillus fumigatus. A dendritic cell preparing to engulf spores of a fungus, Aspergillus fumigatus.
Video: Dorsal Recumbent Position

For a complete list of videos, visit our video library