Fill in the blanks :

(a) A quantity which can vary from one individual to another is called a ……………

(b) Sizes of shoes are …………… variables.

(c) Daily temperature is …………… variable.

(d) The range of the data 7, 13, 6, 25, 18, 20, 16 is ……………

Range of the data is the difference between the highest and the lowest values.

(e) In the class interval 35-46; the lower limit is …………… and upper limit is ……………

(f) The class mark of class interval 22 - 29 is ……………

Find the actual lower class limits, upper class limits and the mid-values of the classes :

10-19, 20-29, 30-39 and 40-49.

Use the table given below to find :

(a) The actual class limits of the fourth class.

(b) The class boundaries of the sixth class.

(c) The class mark of the third class.

(d) The upper and lower limits of the fifth class.

(e) The size of the third class.

Construct a cumulative frequency distribution table from the frequency table given below :

(i)

(ii)