Question

Find the mean for the following
C.I. F
0-10. 3
10-20. 5
20-30. 9
30-40. 5
40-50. 3

Answer 1

Answer:

Mean for the following data = 25

Step-by-step explanation:

C.I fi xi di vi fivi

0-10 3 5 -20 - 2 - 6

10-20 5 15 -10 -1 -5

20-30 9 A = 25 0 0 0

30-40 5 35 10 1 5

40-50 3 45 20 2 6

____ _____

25 0

Mean = A + h(fivi)/fi

= 25 + (10 × 0)/25

= 25 + 0

= 25