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LAB MAN > QUANTITATIVE TESTS > Flashcards

QUANTITATIVE TESTS Flashcards

1
Q

are substances that contain an established amount of the substance being tested- the analyte.

A

CONTROLS

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2
Q

solutions with specified defined concentrations that are used to set or calibrate instruments, kit or system before testing is begun.

A

CALIBRATORS

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3
Q

solutions with specified defined concentrations that are used to set or calibrate instruments, kit or system before testing is begun.

A

STANDARD

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4
Q

types of sources of control material

A
  • FROZEN
  • FREEZE - DRIED / CHEMICALLY PRESERVED
  • ASSAYED CONTROLS - predetermined target value
  • UNASSAYED / IN-HOUSE
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5
Q

repeated measurements

A

CENTRAL TENDENCY

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6
Q

three measures of central tendency are:

A
  • MEAN
  • MEDIAN
  • MODE
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7
Q

the number that occurs most frequently.

A

MODE

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8
Q

the central point of the values when they are arranged in numerical sequence.

A

MEDIAN

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9
Q

the arithmetic average of results.

A

MEAN

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10
Q

one or more data points appear to be too high or low for the set of data, they should note included when calculating QC.

A

OUTLIERS

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11
Q

the closeness of the measurements

A

ACCURACY

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12
Q

the amount of variations in the measurements

A

PRECISION

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13
Q

square root of the sum of the squared differences of each data point from the mean divided by n-1 for samples

A

STANDARD DEVIATION

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14
Q

SD of a set of data points divided by the mean result expressed as percentage or as decimal points.

A

COEFFICIENT OF VARIATION

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15
Q

are control charts used to plot quality control values against previously set limits to determine if a procedure is in or out of control

A

LEVEY-JENNINGS (L-J) CHARTS

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16
Q

Two types of Error

A
  • RANDOM ERROR
  • SYSTEMATIC ERROR
17
Q

occurs at any time and place within the testing or service process. This type of error generally does not reflect a failure in some part of the testing system.

A

RANDOM ERROR

18
Q

occurs in a consistent direction or pattern. It indicates some failure in the system that can and should be corrected

A

SYSTEMATIC ERROR

19
Q

when control is on the same side of the mean for five consecutive runs

A

SHIFT

20
Q

when control is moving in one direction and appears to be heading toward an out of control value.

A

TREND

21
Q

served as criteria interpreting the values that are plotted in Shewhart Levey-Jennings Chart

A

WESTGARD RULES

LAB MAN (11 decks)

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