Since 1961, NRCan researchers have been visiting the Devon Island icecap in Nunavut to monitor the effects of global warming. They’ve found that the thickness of the ice has decreased by about five metres. Now they don’t have to travel to the icecap as frequently, since they also have available data from the European Space Agency (ESA) satellite CryoSat-2. The ESA website claims to measure ice thickness to an accuracy of plus or minus one centimetre. Give a precise statistical interpretation of what you think it means by “plus or minus one centimetre.”