Asample of n = 16 individuals is selected from a population with a mean of μ = 78. a treatment is administered to the individuals in the sample and, after treatment, the population variance is known to be σ 2 = 144. a. if the treatment has a 4-point effect and produces a sample mean of m = 82, is this sufficient to conclude that there is a significant treatment effect using a two-tailed test with α = .05? (3 pts)