Is the plant density of a species related to the altitude at which data are collected? Let Y denote the species density and X denote the altitude. We obtain the following information. n = 20, correlation coefficient, r = -0.6 Choose the correct p-value (closest one) for testing whether the population slope of the line relating Y to X is 0 or not: Ho : 1 = 0 us H1 : B, # 0. O 0.005 O 0.0025 O 0.002 0.012 O 0.021