In the first proof reading of a book containing 300 pages the following distribution of misprints was obtained: No. of misprints per pages (x): 0 1 2 3 4 5 No. of pages (f): 154 95 36 9 5 1 Find the average number of misprints per page.

Question

Philoid · Accepted Answer

Let the assumed mean (A) = 2

No. of misprints per pages (x_i)	No. of pages (f_i)	u_i = x_i – A = x_i - 2	f_iu_i
0	154	-2	-308
1	95	-1	-95
2	36	0	0
3	9	1	9
4	5	2	10
5	1	3	3
	N = 300		∑f_iu_i = -381

Average number of misprints per day = A +

= 2 + =

= = 0.73

No. of misprints per pages (x):	0	1	2	3	4	5
No. of pages (f):	154	95	36	9	5	1

In the first proof reading of a book containing 300 pages the following distribution of misprints was obtained:No. of misprints per pages (x):012345No. of pages (f):1549536951Find the average number of misprints per page.

In the first proof reading of a book containing 300 pages the following distribution of misprints was obtained:

No. of misprints per pages (x):

0

1

2

3

4

5

No. of pages (f):

154

95

36

9

5

1

Find the average number of misprints per page.