uncertainty and error analysis

Uncertainty

Something that is doubtful and lacking

Error

Wrong or a mistake

TRUE or FALSE?

In an analysis there is always a degree of uncertainty

FALSE

TRUE or FALSE?

In measurement ther is always a degree of uncertainty.

TRUE

TRUE or FALSE?

Physical measurements are never exact.

TRUE

Precision

Refers to how close or consistent the independent measurements of the same quantity are to one another.

Accuracy

Refers to a closeness of a measurement to the expected value of a physical quantity.

Random errors

Refers to unpredictable or inevitable changes during data measurement.

How to reduce random errors?

By increasing the number of trials

Systematic errors

Comes from the measuring instrument or in the design of the experiment

Another way to estimate errors from multiple measurements of a physical quantity is to determine the?

Variance

Percent difference

It is a measure of how far apart the different measurer values are from each other

Percent difference

It is an indication of precision

Percent error

It is calculated

Percent error formula

Measured value - accepted value all over accepted value X 100

Percent difference formula

X1 - X2 all over X1 + X2 all over 2 X 100

What is the topic?

uncertainty and error analysis