STEVIE-G™ 發問於 科學及數學數學 · 10 年 前

Normal distribution

For X~N(μ,σ^2), find k such that:

P(μ-2k<X<μ+k)=0.9

更新:

Yes...I know ilovemadonna2009's answer is not accurate since the answer is just obtained by observation.

更新 2:

doraemonpaul, 你後邊D圖好似睇唔到...

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