176. Alternative Hypothesis176.0.1. Alternative (𝐻1 or 𝐻𝑎)Presence of an effect or a differenceTwo-Tailed𝐻1:𝜇≠𝜇0Right-Tailed𝐻1:𝜇>𝜇0Left-Tailed𝐻1:𝜇<𝜇0