Question

• Calculate arithmetic mean of the following series.
Tahe 15 as assumed mean and use Assumed mean method
size 20 19 18 17 16 15 14 13 12 11
frequency 1 2 4 8 11 10 7 4 2 1​

Answer 1

Answer:

16.34

Explanation:

Arithmetic mean = £fx/£f

£fx = 20+38+112+136+176+150+98+52+24+11

£fx = 817

£f = 1+2+4+8+11+10+7+4+2+1 = 50

arithmetic mean = 817/50

:Arithmetic mean = 16.34