GCSE Secondary Maths Age 13-17 - Probability & Statistics: Frequency Polygon - Explained

The video tutorial explains how to create a frequency polygon by plotting mid values from a frequency table. It emphasizes the importance of using mid intervals and provides a step-by-step guide on plotting points and joining them with straight lines to form the polygon. The tutorial also covers the marking scheme, highlighting the allocation of marks for plotting and joining points. A recap reinforces the key concept of using mid values in frequency polygons.

What is the key concept to remember when dealing with frequency polygons?

• Plotting the highest value

• Using the mid value

• Calculating the total frequency

• Finding the range

When plotting a frequency polygon, what is the first step?

• Join the points

• Calculate the mean

• Plot the mid values

• Draw the axes

What is the mid value for a class width of 160 to 165?

• 160

• 162.5

• 165

• 163

How should the points be joined when constructing a frequency polygon?

• Using freehand

• With a ruler

• With a compass

• Using a protractor

How many marks are allocated for correctly plotting and joining points in a frequency polygon?

• Four marks

• Three marks

• Two marks

• One mark