The marks of 24 candidates in the subject mathematics are given below :

45 48 15 23 30 35 40 11

29 0 3 12 48 50 18 30

15 30 11 42 23 2 3 44

The maximum marks are 50. Make a frequency distribution taking class intervals 0-10, 10-20, …………… .

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 and upper class limits and also the class marks of the classes :

1.1-2.0, 2.1-3.0 and 3.1-4.0.

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.