Final answer:
To check heat flow statistically, compare measurements for the first and last 5 time periods and analyze the rate of conductive heat transfer for a substance.
Step-by-step explanation:
The question asks about checking heat flow statistically by comparing measurements for the first 5 time periods with the measurements for the last 5 time periods. This can be done by analyzing the rate of conductive heat transfer for a substance. The rate of conductive heat transfer through a slab of material is given by Fourier's Law, which states that the rate is proportional to the temperature difference across the material and inversely proportional to the thickness of the material. By comparing the heat transfer rates for the first 5 time periods and the last 5 time periods, one can determine if there has been a change in the heat flow.