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Durant 50 dies hem observat el nombre de passatgers que agafaven un tren:
| 70 | 30 | 50 | 40 | 50 | 70 | 40 | 75 | 80 | 50 |
| 50 | 75 | 30 | 70 | 100 | 150 | 50 | 75 | 120 | 80 |
| 40 | 50 | 30 | 50 | 100 | 30 | 40 | 50 | 70 | 50 |
| 30 | 40 | 70 | 40 | 70 | 50 | 40 | 70 | 100 | 75 |
| 70 | 80 | 75 | 70 | 75 | 80 | 70 | 70 | 120 | 110 |
Calculeu la desviació típica.
(Resposta amb 2 decimals)