MATHEMATICS Fill in the blanks.

The class-mark of the class-interval 9.5-19.5 is …………..

The class-mark of the class-interval 20-30 is …………..

Upper limit of the class-interval 16-20 is …………..

Lower-limit of the class-interval 24-30 is …………..

The mid-point of a class-interval is called the ………….. of the interval.

The number of observations in a class-interval is called the ………….. of the interval.

The difference between the maximum and minimum observations in a data is called the ………….. of the data.

The class-mark of the class-interval 9.5 - 19.5 is _________.

The class-mark of the class-interval 20 - 30 is _________.

Upper limit of the class-interval 16 - 20 is _________.

Lower-limit of the class-interval 24 - 30 is _________.

The mid-point of a class-interval is called the _________ of the interval.

The number of observations in a class-interval is called the _________ of the interval.

The difference between the maximum and minimum observations in a data is called the _________ of the data.