Result

Tabulate the readings

Sl.No.

Class interval

Mid range

No. of fish caught (N)

T1 lower limit

T2 upper limit

ê t (T2-T1)

loge 12Nt'> (y)

Mean relative age 12T1+T22'> (x)

1.

6-7

6.5

3

2.

7-8

7.5

143

3.

8-9

8.5

271

4.

9-10

9.5

318

5.

10-11

10.5

416

6.

11-12

11.5

488

7.

12-13

12.5

614

8.

13-14

13.5

613

9.

14-15

14.5

493

10.

15-16

15.5

278

11.

16-17

16.5

93

12.

17-18

17.5

73

13.

18-19

18.5

7

14.

19-20

19.5

2

15.

20-21

20.5

2

16.

21-22

21.5

0

17.

23-24

22.5

1

18.

24-25

23.5

1

Last modified: Wednesday, 27 June 2012, 11:02 AM