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Eng0013 > Measurement Theory > Flashcards

Measurement Theory Flashcards

1
Q

Accuracy

A

A measurement is accurate if it is close to the true value for that physical quantity

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2
Q

Precision

A

Measure of spread from the mean - which is close to the mean of all the measurements taken - does not say if close to true value

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3
Q

Types of Errors

A

Random Errors
Systematic Errors
Mistakes

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4
Q

Random Errors

A

Influence Precision

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5
Q

Systematic Errors

A

Influence accuracy

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6
Q

Mistakes

A

Lead to bad data points

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7
Q

Why do Random Errors Occur?

A

Variations in Environmental conditions
Variations due to manafacture
Limitations of Equipment

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8
Q

How to minimise Random Errors?

A

Good Experimental Practice
Take a mean
More repeat measurements

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8
Q

Why do Systematic Errors occur?

A

Parallax Errors
Environmental Conditions
Zero Error
Calibration Error

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9
Q

How to minimise Systematic Errors?

A

Checking equipment reads zero
Taking a background reading

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Eng0013 (13 decks)

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