Question

To find mean to the given data by direct method. class interval= 1-5, 5-9, 9-13, 13-17, 17-21. frequency=4,3,5,7,1​

Answer 1

Answer:

first u have to do class interval to xᵢ is =upper limit - lower limit /2

after converting direct method formula x = ∑fᵢ / xᵢ