1

What are the class intervals used?

  Class intervals
A 3 8 13 18 23 28
B 1 – 5 6 – 10 11 – 15 16 – 20 21 – 25 26 – 30
C 2 – 5 6 – 10 11 – 15 16 – 20 21 – 25 26 – 29
D 2 – 4 7 – 9 12 – 14 17 – 19 22 – 24 27 – 27

  • A

  • B

  • C

  • D