Estimate Probability for Normal Distribution IB SL Math | mean and standard deviation analysis

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Hi Sir, Under which playlist i can see all your Statistics videos?

mahendragoduguluru
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Very well explained, thank you for that! But, as far as I've heard, we are not required to know that the are between 1 and -1 std. dev. is 0.68 etc. Is that not correct?

YonaahrUnofficial
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I'm not sure if I do not understand Sir's answer to b or there's a problem to it...

princessmalobola
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Sir, i think problem "b"having 2.5% probability.

ChandanKumar-dbwm