Question

PLEASE HELP MATHS !!!!​

Answer 1

Answer:

Hope it will be helpful to you !!!

Answer 2

Step-by-step explanation:

(a)

Lower class limit of the interval 36 - 45 = 36 and

Upper class limit of the interval 36 - 45 = 45

(b)

Class Size of the interval 26 - 35 = 10 and

Class Mark of the interval 26 - 35 = 30 (Class Mark is the average of the limits of the class interval)

(c)

The class intervals when changed into overlapping class intervals are

15.5 - 25.5

25.5 - 35.5

35.5 - 45.5

45.5 - 55.5