Pierre Simon Laplace, Inverse Probability, Central Limit Theorem, Probability, Deep Dives.
X_bar_n = 398.81598 Mbps. To do that, you set α = 0.05. The inverse of Φ(1–0.05/2) is 1.96. You know that X_bar_n = 398.81598, S = 2.38838, and n = 25. So you have everything you need to calculate μ_low, μ_high as follows: The 95% confidence bounds for the unknown mean broadband speed (Image by