A)The class intervals must be closed.

B)The width of each class interval should be equal.

C) The mid-value of each class interval must represent the average of all values in that class.

D) All values of observations cannot be evenly distributed.

Choose the most appropriate answer from the options given below:

  • A

    A and B only




  • B

    A, B and C only

  • C

    A and C only

  • D

    A, B, C and D