Normal Distribution - Harder Questions (1 of 3: Population within given z-scores)

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Glad I watched this video just before my 1st exam.

nj
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second but doesn't matter because this is generally going to be a reference mathematics material. I like maths but hate probability or any statistics for that matter. But this lecture actually got to my head. What i would have given for this video to be up about 1.5 years ago before my IBDP Finals

KunalGuptaa
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Anyone know why it is that 65%, 95% and 99.7% of info lies within 1, 2 and 3 standard deviations respectively. The rest of it makes sense.

sankyeat