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Distributionsmedium
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For a normal distribution X∼N(μ,σ2)X \sim N(\mu, \sigma^2)X∼N(μ,σ2), what percentage of the data lies within the interval (μ−2σ,μ+2σ)(\mu - 2\sigma, \mu + 2\sigma)(μ−2σ,μ+2σ)?