Answer
Yes.
Work Step by Step
By plotting the data on Excel, the line's equation we get is $\rho=-0.00019\times T + 1.00133$
At 20°C, from this equation we get: $\rho = 0.99753\ g/cm^3$.
The relative deviation from the density your partner found is:
$E=\dfrac{0.99910-0.99753}{0.99753}\times100\%=0.16\%$
It is a reasonable number given the small deviation.
Since the densities are presented with 5 significant numbers, this deviation might be too big, but that information is outside the scope of the question.
