Embedded Files
WHAT ARE SCATTER GRAPHS AND WHAT DO THEY TELL US?
WHAT ARE SCATTER GRAPHS AND WHAT DO THEY TELL US?
Scatter Graphs show the relationship between two variables or factors. The 'strength' or lack of relationship between the two variables is know as Correlation.
Scatter Graphs and Correlation.pdfHOW TO ANALYSE A SCATTER GRAPH AND DETERMINE THE RELATIONSHIP (CORRELATION)
HOW TO ANALYSE A SCATTER GRAPH AND DETERMINE THE RELATIONSHIP (CORRELATION)
1. Look at the distribution of dots on the graph.
2. Draw a 'line of best fit', which is line that roughly passes through the middle of the distribution of dots.
3. Look at the direction and slope of the line to determine the correlation. Use the diagram to the right to work out the correlation.
4. look at the information presented on the x and y-axis to understand the relationship presented in the scatter graph.
QUESTION
QUESTION
What is the relationship between 'Low global cloud cover vs global surface air temperature'?
SAMPLE ANSWER
SAMPLE ANSWER
The graph above shows a weak negative correlation. The x-axis represents the percentage of cloud cover increasing from 21 to 31% on the graph. The y-axis represents global air surface temperature, degrees Celsius, increasing from 14.6 C to 15.9 C.
Therefore there is weak relationship between cloud cover and air temperature -
The higher the cloud cover e.g. 30%, the lower the air temperature 15.1 Celsius.
OR
The lower the cloud cover 21%, the higher the air temperature 15.6 Celsius
Google Sites
Report abuse