Question

find the mean of the following frequency distributions 5,17,11,2,10,2,7,9,10,11

Answer 1

mean =5+17+11+2+10+2+7+9+10+11 / 10
mean =8. 4

Answer 2

Mean=sum of the given observations/no.of observations
=5+17+11+2+10+2+7+9+10+11/10
=84/10
=8.4


Hope this helps.....