reliability, accuracy, precision Flashcards
define accurate
how close measurement is to the true/ accepted value
define reliability
how small the variations btw values are
define precise
how close measurement of the same value are to each other
define measurement error
diff btw measured value and true value
define true value
value you get in an ideal experiment
note: accuracy is between true value
precision is between results
define repeatability
if you can get same result when doing the same experiment again
define reproducibility
if you can get same results when doing a diff experiment
define validity
-experiment is fair or not
-have controlled variables
define range
max and minimum values of the variables
define anomaly
value which is outside of general pattern of values
define dependent variables
-what you measure
-x axis
-left of table
define independent variable
-what you change
-y axis
-right of table
how to increase reliability
-take minimum 3 readings and find mean
-repeat experiment and find mean value
-make sure rest of variables are controlled
Phy:
-use equipment properly
-repeat experiment 3 times
-follow the method closely
define control variables
-what you keep the same
-helps with comparison
-for validity
