Card 21
Question
Median:
Answer
The middle value of an entire data set
Lab Math defenitions
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Median:
The middle value of an entire data set
Mode:
The number that comes up the most (the value that appears most frequently in a set of data)
Meter:
The base unit of measurement of distance
Mole:
A fundamental unit of mass used by chemists. This term refers to a large number of elementary particles; atoms, molecules, ions, electrons
Molality:
Refers to the number of moles per kilogram of solvent. It is expressed as a concentration of weight per unit
Molarity:
Refers to the number of moles of solute per litre of solution. A mole is the number of grams of a substance that is equal to its atomic or molecular weight. Its importance is useful to know how many molecules are present for a reaction to take place.
Normal Range:
Is the range of results that are expected to be found when a healthy individual is tested
Osmolarity:
Number of osmoles of solute per litre of solution
Osmole:
a unit of osmotic pressure equivalent to the amount of solute that dissociates in solution to form one mole (6.02 x10^23) of particles
Osmolality:
Is the number of osmoles of solute per kilogram of solvent
Panic Value:
Is a patient’s lab result that is life-threatening if action is not taken quickly
pH:
Hydrogen ion concentration
Percent:
A value expressed as part of 100
Precision:
Repeated results give the same value
Predictive Values:
Means or ability to predict the results of an analysis of the same data by using another test instrument. It contributes to the validity of the test
Proficiency Testing:
Program under which samples are sent to a group of laboratories for analysis. Results are compared with the laboratories participating in the program
Proportion:
2 or more ratios having the same relative meaning but with different numbers
Quality Assurance:
Encompasses every aspect of laboratory testing beginning with the physician ordering a test and ending when they receive the laboratory report with the test results
Quality Control:
Is part of QA which involves the processes undertaken during the actual testing of the patient samples to ensure that the test results are reliable
Ratio:
Example 1:4 where the first number represents the parts of the substance used and the second number the parts of the solvent used
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