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| Q.129 | There are 40 students in a class. five students are picked out and their heights (in cm) are 150, 140, 142, 139, 151. calculate the standard deviation (approx.) of their heights. | |
| Ans | 1. 5.89 | |
| 2. 5.76 | ||
| 3. 5.51 | ||
| 4. 5.68 |
Correct Ans Provided: 4
