Accuracy And Precision Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Prime consideration in every measurement made

A

Accuracy and precision

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Unavoidable in measurement due to several factors

A

Errors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Factors why error occurs

A
  1. The kind of measuring device use
  2. Methods in getting the measurements
  3. Condition under which measurement is made
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Types of error

A
  1. Random error (unsystematic error)
  2. Systematic error
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Error that has no pattern, inconsistent

A

Random error

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Error that is consistent and repeatable due to the kind of measuring devices used. It is also due to flawed experimental design

A

Systematic error

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Closeness or nearness of measurement to the accepted value. Express in terms of absolute error or percentage of error

A

Accuracy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Describes how closely measurements are to each other and how carefully measurements were made Agreement of several measurements made in the same way. Express in terms of deviation or percentage of deviation

A

Precision

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Accuracy formula

A

AE= |O-A|

Where:
AE- absolute error
O- observed value
A- accepted value

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Precision formula

A

AD= |O-M|

Where:
AD= absolute deviation
O- observed value
M- mean of several measurements

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How to get percentage of error and accuracy

A

% of error= AE/A × 100%

% or accuracy= 100%- % or error

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How to get percentage of deviation and precision

A

% of deviation = AD (ave)/ M × 100%

% of precision = 100% - % of deviation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly