Statistical are the requirements that the population from which one is sampling has specific characteristics that will allow one to make accurate inferences.

Assumptions.

Explanation:

'Statistical assumptions' are demonstrated as the requirements that involve the population, from which samples are collected on the basis of possession of particular characteristics that allows deducing precise conclusions. The samples are selected from the population by carefully observing certain characteristics in them as they are representative of the entire population that helps in generating an accurate and reasonable deduction or data because an incorrect sampling may end up in wildly false and invalid conclusions. Therefore, 'assumptions' is the correct answer.

answer: a

explanation:

according to hess's theory, when the magma cooled, it would expand and push the tectonic plates apart. it would push the north and south america plates to the west and eurasia and africa ones to the east. the atlantic ocean would get wider but the coastlines of the masses would stay the same.

harry hammond hess was a geologist and a united states navy officer in the second world war. he is considered to be one of the founding fathers of the theory of plate tectonics. he is known for his theories on sea floor spreading, stating that the movement of the continents was the result of see floor spreading. the continents are attached to the plates and do not move separately. the plates themselves shift and change shape, carrying the continents along.