[Solved] Piano Company owns 55% of the voting common stock shares of Keys Corporation.Which of the following is true? A)The investment would be accounted for using the equity method. B)The investment would be accounted for by consolidation. C)The investment would be accounted for under the market value method. D)The investment would be accounted for under the amortized cost method. Hypothesized Mean Difference: The presumed difference between the means of two populations or conditions being compared in a statistical hypothesis test. Two-Tail: A term used in statistics referring to the two-tailed test of significance that checks for the possibility of positive or negative differences. Observations: The act of noting and recording something with instruments or the naked eye as part of a scientific or empirical study. Untreated Population: A group in a study or an experiment that does not receive the treatment or intervention being tested.