Question

Hey there...having problem with a question...please help

Marks : 16,17,18,19,20,22,23,24,25
Frequency : 1 , 1 , 3 , 1 , 5 , 3 , 5 , 4 , 2

Find the mean of the above frequency distribution

Answer 1

Answer:

class class. frequency xifi

mark xi. fi

16. 16.5. 1

17. 17.5. 1

18. 18.5 3

19. 19.5 1

20 20.5 5

21 21.5 0

22 22.5 3

23 23.5 5

24 24.5 4

25 25.5 2

NOW YOU CAN FIND IT

Answer 2

Mean= Sum of observations
Number of observations
= 1+1+3+1+5+3+5+4+2
9
=25
9
=2.7 is the mean of the frequency
The mean of the marks is
Mean= Sum of observations
Number of observations
=16+17+18+19+20+22+23+24+25
9
=184
9
=20.4 is the mean of the marks

I HOPE THIS HELPS❤️