AI generatedStatisticsGCSE Higher / IGCSE Extended

Finding a frequency from density and class width

Finding a frequency from density and class width.

  • Class width = upper boundary − lower boundary.
  • Frequency density = frequency ÷ class width; frequency = class width × density.
  • Histogram bar area represents frequency. Use a continuous horizontal scale and label density on the vertical axis.

Example 1

A histogram class is and its density is . Find the frequency.

Class widthFind the width before multiplying.
FrequencyFrequency = bar area = class width × frequency density.

Example 2

A histogram class is and its density is . Find the frequency.

Class widthFind the width before multiplying.
FrequencyFrequency = bar area = class width × frequency density.

Your turn

Question 1

A histogram class is and its density is . Find the frequency.

Check answer
Class widthFind the width before multiplying.
FrequencyFrequency = bar area = class width × frequency density.
Question 2

A histogram class is and its density is . Find the frequency.

Check answer
Class widthFind the width before multiplying.
FrequencyFrequency = bar area = class width × frequency density.
Question 3

A histogram class is and its density is . Find the frequency.

Check answer
Class widthFind the width before multiplying.
FrequencyFrequency = bar area = class width × frequency density.
Question 4

A histogram class is and its density is . Find the frequency.

Check answer
Class widthFind the width before multiplying.
FrequencyFrequency = bar area = class width × frequency density.
Question 5

A histogram class is and its density is . Find the frequency.

Check answer
Class widthFind the width before multiplying.
FrequencyFrequency = bar area = class width × frequency density.
← All Statistics cardsReport a mistake