Question
Differentiate between fixed base and chain base method. (Any Three points)
| Feature | Fixed Base Method | Chain Base Method |
| Base Period | Remains constant (fixed) for all years. | Changes every year; the preceding year is the base. |
| Comparison | Easy to compare current data with a specific past period | Ideal for comparing data with the immediate past. |
| Flexibility | Rigid; difficult to include new items or delete old ones. | Flexible; new items can be added or deleted easily. |
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| Time $t$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
| Production $($units$)$ | $21$ | $22$ | $23$ | $25$ | $24$ | $22$ | $25$ | $26$ | $27$ | $26$ |
| Quality | Shift | |
| $1$ | $11$ | |
| Defective Units | $20$ | $40$ |
| Non-defective Units | $100$ | $150$ |