Problem 3
Wael and Letty have both measured the mass density of an object a few times. Their results are shown below in g/cm³
| Wael |
Letty |
| 2.55 |
2.65 |
| 2.59 |
2.71 |
| 2.61 |
2.59 |
| 2.54 |
2.71 |
| 2.61 |
2.61 |
| 2.60 |
2.59 |
Wael calculates the mean value to be 2.58 g/cm³, and Letty 2.64 g/cm³.
Wael says: 'We cannot have measured objects with the same density, because our mean values are different.'
Letty says: 'We might have measured objects with the same mass density, because we have overlap in our uncertainty intervals.'
| 