The best way to display collected data is in a table. This helps to organise your data collection.
The following are good guidelines when presenting results in tables:
A student has been investigating how the time for ten swings of a pendulum varies with length. They record the following results:
|Length (cm)||Attempt 1 (s)||Attempt 2 (s)||Attempt 3 (s)||Average time for ten swings (s)|
When doing calculations with measured answers, the answer should have the same number of significant figures as the measured value.
When rounding a number that has more significant figures than are justified, round up if the last figure is between 5 and 9 inclusive, if it is between 0 and 4 inclusive round down.
For example, the number 3.5099 rounded to:
Charts are a way to display data after it has been collected.
A pie chart shows a category compared with the whole. For example, the percentage of each energy source used in the UK can be shown using a pie chart.
Continuous data can take any value in a given range. It includes time, mass and length.
Continuous data should be presented on a line graph. Line graphs are particularly useful in helping to spot any trends or patterns in the data. For example, the relationship between current and voltage for a resistor.
The following is best practice when drawing graphs: