Working Scientifically Flashcards
What type of graph shows continuous data
Line graph
Categoric data
Collection of information that is divided into groups (hair colour
How to make repeat results more reliable
Get rid of anomalous results before calculating mean
Continuous data
Data that can take any value (height, length)
Types of data
Categoric
Continuous
Directly proportional
As the independent variable increases, the dependent variable increases
Random error
Error that causes anomalous results, the readings will be too large or too small
Inversely proportional
As the independent variable increases, the dependent variable decreases
Systematic error
Error that causes readings to differ from the true value by the same amount each time a measurement is made
What causes random errors
Misreading equipment or not following the method correctly
How will a directly proportional graph look
Straight line through origin with positive gradient
What causes systematic errors
-Measuring equipment that has not been calibrated correctly
- or a piece of equipment that does not reset to 0 correctly
What does repeatable mean
The same person repeats an experiment and gets similar results
What does an inversely proportional graph look like
Reciprocal graphs consisting of one smooth curve
How to check that 2 variables are directly proportional
Take 3 data points from the graph and divide the variables (y\x=k) answer will be same every time
