Newton 2

Question 1

What are two types of errors?

Answer 1

Positive error (too large, to high…) and negative (too small, too low…)

Question 2

What is precision?

Answer 2

Precision describes the reproducibility of measurements. The closeness of result that have been obtained in exactly the same way.

Question 3

What is accuracy?

Answer 3

It indicates the closeness of the measerements to the true or accepted value.

Question 4

How to calculate absolute error?

Answer 4

E=x_i-x_t

Question 5

How to calculate relative error?

Answer 5

E_r=E/x_t *100%

Question 6

What is random (indeterminate) error?

Answer 6

Data scattered approximetely symmetrically about a mean value. Affects precision - dealth with statistically.

Question 7

What is systematic (determinate) error?

Answer 7

Causes the mean to be displace from the accepted or known value. Several possible sources. In general, all determinations are too high or too low. Affects accuracy.

Question 8

What is gross error?

Answer 8

Occasional, often large and usually very obvious- gross errors give rise to outlier readings. Detectable by carrying out sufficient replicate measurements.