Question

find the width of class interval (20-30)?​

Answer 1

Answer:

To find the width:

Calculate the range of the entire data set by subtracting the lowest point from the highest,

Divide it by the number of classes.

Round this number up (usually, to the nearest whole number).

Answer 2

Step-by-step explanation:

Find the midpoint of the class interval 30- 40. ... Marks. 10 - 20. 20 - 30. 30 - 40. 40 - 50. 50 - 60 . 60 - 70. 70 - 80. Frequency. 3. 7. 10 ... The size or width of the Class interval (0 - 4) is. A. 4.