Question

I need step explanation

In the class weight of students special do for the class records calculate mean weight of the class student using step division method

weight in kg:15-25,25-35,35-45,45-55,55-65,65-75

No .of.students:4,11,19,14,0,2​

Answer 1

Step-by-step explanation:

In the class, weight of students is measured for the class records. Calculate mean weight of the class students using Direct method. Weight in kg 15-25 25-35 35-45 45-55 55-65 65-75 No. of students 4 11 19 14 0Read more on Sarthaks.com - https://www.sarthaks.com/975424/weight-students-measured-class-records-calculate-weight-class-students-using-direct-method

Answer 2

Answer:

Weight

Mid

No. of

in

value

students

e.g.

(kg)

(x)

(f)

15 - 25

20 20

4

80

25 - 35

30

= 11

330

35 - 45

40

19

760

45 - 55

50

14

700

55 - 65

80 60

0

0

65 - 75

R 70

2

140

Σ fx =

Σ + = 50

2010

Arithmetic mean =

Σ fx

=

2010

50

= 40.2

Arithmetic mean = 40. 2

X