Question

mean method class interval 0-5 5-10 10-15 15-20 20-25 frequency 8 9 5 3 1​

Answer 1

[

Answer:

The formula used for arithmetic mean of grouped data by step deviation method is,

X

=A+

∑f

∑fu

×i

A= Assumed mean of the given data

∑ = Summation of the frequencies given in the grouped data

∑fu = Summation of the frequencies and deviation of a given mean data

u=

i

(x−A)

i= Class interval width

X

= arithmetic mean

X

=22.5+

105

172

×5

=22.5+8.19

=30.69 ≈ 31

Answer 2

Answer:

please mark as brainlist

Step-by-step explanation:

mean method class interval 0-5 5-10 10-15 15-20 20-25 frequency 8 9 5 3 1