MCQ
For certain data, the following information is available. Obtain the combined standard deviation.
| X | Y | |
| Mean | 13 | 17 |
| S.D. | 3 | 2 |
| Size | 20 | 30 |
- A15.4
- ✓3.14
- C9.84
- D1.54
✓
Answer
Correct option: B.
3.14
B
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