# Biology analysis key words

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Accuracy
Is how closeness of agreement there is between a result and the true value
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Precision
A measure of how close the repeats are to one another
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Error
(Of measurement) is the difference between an individual measurement and the true value
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Uncertainty
An estimate of the range of values within with true value is thought to lie.
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Anomaly
Is a value in a set of results that is judged not to be a part of the inherent variation and does not follow the trend.
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Confidence
Is a statement expressing how strong a conclusion is based on the publicly of the evidence.
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Repeatability
Is the precision of results collected by one person with the same equipment on the same day
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Reproducibility
The precision of results collected by different people using equivalent equipment in different places over a wider period of time
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Resolution
The smallest change in quantity that can be detected by a piece of measuring equipment e.g the resolution of a ruler is 0.5mm
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Validity
A measurement is valid if it measures what it is supposed to be measuring. An experiment is valid if it is suitable to answer the question being asked
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Independent variable
The variBle the 'input' or 'cause' in the experiment. Plotted on the x axis
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Dependent variable
The variable the 'output' or 'effect' in the experiment ). is usually the variable that you measure) plotted on the y axis
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Controlled variable
Something in an experiment which must be kept the sa,e in order to test the relationship between the independent variable and dependent variable to ensure the validity of the results
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Positive controls
These will produce an expected effect in an experiment in order to comparing this to the independent variable that is being investigated in the experiment
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Negative controls
These will produce no effect in an experiment. They ensure that there is no effect when there should be no effect. E.g the use of water place if a drug to probe that any effects are as a result of the drug and nothing else writhing the experiment
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## Other cards in this set

### Card 2

#### Front

A measure of how close the repeats are to one another

Precision

### Card 3

#### Front

(Of measurement) is the difference between an individual measurement and the true value

### Card 4

#### Front

An estimate of the range of values within with true value is thought to lie.

### Card 5

#### Front

Is a value in a set of results that is judged not to be a part of the inherent variation and does not follow the trend.