The difference between the greatest and the smallest values of observations is called :

1. frequency

2. range

3. class-mark

4. class-limit

The difference between the upper and lower class-limits of a class-interval is called :

1. width of the class-interval

2. frequency

3. class-limit

4. class-mark

In a pie-chart, the angle corresponding to different components is :

1. $\dfrac{\text{value of the component}}{\text{total value of all the components}} \times 360°$

2. $\dfrac{\text{total value of all the components}}{\text{value of the component}} \times 360°$

3. total value of all the components x value of the component x 360°

4. $\dfrac{360°}{\text{total value of all the components} \times \text{value of the component}}$

Consider the following class intervals of a grouped data :

Statement 1: Class marks of the 3^rd class intervals is 46.5.

Statement 2: If the class mark of 2^nd interval is 77.5, the interval is 60 - 85.

Which of the following options is correct?

1. Both the statements are true.

2. Both the statements are false.

3. Statement 1 is true, and statement 2 is false.

4. Statement 1 is false, and statement 2 is true.