By using the chebyshev inequality, find a lower bound for the probability that the average of her measurements will differ from the actual specific gravity of the body by less than σ/4 units.

To find the Chebyshev's inequality, P | Xn - E (X) | = 1 - (δ^2/25) / (δ^2/16) = 1 - (16/25) = 9/25 = 0.36

The answer in this question which is the probability that the average of the physicist's measurement is within δ/4 units of the actual specific gravity is at least 0.36%