Question

For any normally distributed random variable with mean μ and standard deviation σ, the percent of the observations that fall between [μ - 2σ, μ + 2σ] is the closest to _______.

Answer 1

The percent of the observations that fall between [μ - 2σ, μ + 2σ] is the closest to 95%

According to the 68-95-99.7 rule (the empirical rule), 95% of the population lies with two standard deviations of mean, that is, in the interval [μ - 2σ, μ + 2σ]