Question

5) Calculate D7, for the following data.
-Profit (in crores ₹)
10-20,20-30,30-40,40-50, 50-60,60-70
-No. of firms
20,30,70,48,32,50​

Answer 1

Answer:

Ans will be 52.1875

Explanation:

First calculate the cummulative frequency

CI. F. CF.

10-20. 20. 20

20-30. 30. 50

30-40. 70. 120

40-50. 48. 168

50-60. 32. 200

60-70. 50. 250

TOTAL. 250

now to know the D7 class use- 7(N)/10

7 * 250/10 = 175

D7 class will be 50-60 as the cf of this class is greater than 175

Using the formula-

L + (7n/10 - cf) i

f

note-- cf in the formula will the cf of preceding class

50 +( 175 - 168 ) 10

32

50 + 2.1875 = 52.1875