This topic contains a solution. Click here to go to the answer

Author Question: The precision limits of a method are defined by: a. The mean b. The SD c. Sensitivity d. ... (Read 89 times)

LCritchfi

  • Hero Member
  • *****
  • Posts: 519
The precision limits of a method are defined by:
 
  a. The mean
  b. The SD
  c. Sensitivity
  d. Specificity

Question 2

Which of the following would most likely be associated with the situation described in Question 11?
 
  a. Operator error
  b. Fading light source
  c. Instrument miscalibrated
  d. Starting a new lot number of thromboplastin reagent



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

maya.nigrin17@yahoo.com

  • Sr. Member
  • ****
  • Posts: 324
Answer to Question 1

ANS: B
Evaluating the same specimen multiple times and applying statistics to the results determine precision or reproducibility. The SD describes the precision. The mean is the average result (assuming a gaussian distribution). Sensitivity describes how well a test identifies positive patients, whereas specificity is how well it identifies only positive patients.

Answer to Question 2

ANS: D
Shifts can occur when a new reagent is introduced. A fading light source would lead to trend error. If the instrument were calibrated incorrectly, then both controls should be out; likewise, operator error would result in both controls being unacceptable.





 

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

For a complete list of videos, visit our video library