Statistics, Probability, Probability Distributions, Random Variable, Data Science.
by using the CDF tables as earlier Image by author P (-1 < z < 1) = CDF ( z < 1) — CDF ( z < -1) = 0.84134–0.15866 = 0.68269 or 68.27% Similarly, around 95% of the time, x to be within μ — 2σ and μ + 2σ And, around 99.7% of the time, x to be within μ — 3σ and μ + 3σ Let us use Normal Distribution