Question

calculate arithmetic mean for the following data.
X : 1,2,3,4,5,6,7,8
Y : 3,5,7,9,6,4,2,1

Answer 1

$arithmetic \: mean \: = \frac{sum \: of \: terms}{number \: of \: terms} \\ x mean \: for \: x = (1+2+3+4+ 5+ 6 + 7 + 8) \div 8 \\ = \frac{36}{8}$

calculate mean for Y same as (1)