GCSE Secondary Maths Age 13-17 - Probability & Statistics: Scatter Graph - Explained

The video tutorial explains how to interpret a scatter graph showing the relationship between the length and width of pine cones. It covers the concept of correlation, including positive, negative, and zero correlation, and demonstrates how to use a line of best fit to estimate the width of a pine cone based on its length. The tutorial also discusses the allocation of marks for correctly using the line of best fit and provides a brief conclusion.

What does the scatter graph in the video represent?

• The length and width of 10 pine cones

• The height and weight of 10 pine cones

• The volume and density of 10 pine cones

• The age and color of 10 pine cones

Which type of correlation is shown when the data points on a scatter graph move upwards?

• Negative correlation

• Zero correlation

• Positive correlation

• Inverse correlation

What happens to the width of the pine cone as its length increases, according to the video?

• The width decreases

• The width increases

• The width fluctuates randomly

• The width remains the same

What is the estimated width of a pine cone with a length of 8.4 cm using the line of best fit?

• 7.4 cm

• 6.2 cm

• 5.0 cm

• 8.0 cm

How many marks are awarded for correctly estimating the width of the pine cone using the line of best fit?

• Three marks

• One mark

• Two marks

• Four marks