Measurement Flashcards
1
Q
What is random error, and how to reduce?
A
Measurements sometimes larger or smaller than true value. Reduced by taking average of repeated readings
2
Q
What is systematic error, and how to reduce?
A
Measurement either always smaller or larger than true value. Cannot be reduced, can be eleiminated by checking instrument
3
Q
What is accuracy?
A
Degree of agreement between result of measurement and true value. Measure of systematic error.
4
Q
What is precision?
A
Degree of agreement of repeated measurements of the same quantity. Measure of random error.
5
Q
If p = (2x+y)/3 , (2x-3y), what is actual uncertainty?
A
(2x+y) /3
6
Q
To what sf or dp to leave calculated uncertainty?
A
1sf, and calculated quantity follow the no. of decimal places.
