Problem 4

Wael and Letty redo their experiment with more precision and measure the mass density of an object a few times. Wael calculates his result to be (2.58 ± 0.02) g/cm³, Letty's result is (2.64 ± 0.02) g/cm³.

Wael says: 'We cannot have measured objects with the same density, because our mean values are different.'

Letty says: 'We cannot have measured objects with the same mass density, because we have no overlap in our uncertainty intervals.'