HSW

Question 1

accuracy

Answer 1

how close the result is to the true value

Question 2

anomaly

Answer 2

a reading which falls outside the normal, expected range o meaurements

Question 3

concordant readings

Answer 3

if repeated readings are identical or close to each other then they are described as concordant and are likely to be reliable

Question 4

controlled variable

Answer 4

variables that are kept constant

Question 5

dependent variable

Answer 5

the variable that is being measured

Question 6

independent variable

Answer 6

the variable that is being changed

Question 7

precision

Answer 7

smallest increment that can be measured e.g. cm or mm

Question 8

reliability

Answer 8

the result of an investigation may be considered reliable if readings are repeated and concordant data is obtained. Achieved by repeating the experiment, removing anomalies and averaging the values

Question 9

Validity

Answer 9

Measureing what you intent to - achieved by keeping all variable constant other than those under investigation