Question

Find the Mean.
CI. 0-10. 10-20. 20-30. 30-40. 40-50.
F. 7. 12. 13. 10. 8​

Answer 1

Answer:

Class Interval frequency (fi) Mid value fixi

0-10 12 5 60

10-20 16 15 240

20-30 6 25 150

30-40 7 35 245

40-50 9 45 405

N=∑fi=50 ∑fixi=1100

∴Mean=

∑fi

∑fixi

=

50

1100

=22

Answer 2

Answer:

sum of observations/number of observations =mean