Fill in the blanks

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

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

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

(iv) Lower-limit of the class-interval 24-30 is …………

(v) Upper limit of the class-interval 16-20 is …………

(vi) The class-mark of the class-interval is 20-30 is …………

(vii) The class-mark of the class-interval 9.5-19.5 is …………

(i) Range

(ii) Frequency

(iii) Class mark

(iv) 24

(v) 20

(vi) 25

(vii) 14.5