ck12.org Normal Distribution Problems: Empirical Rule

[DivaMCFan]

Hi I have a question; 1). Weights of adult women have a mean of 143 poundsd and a standard deviation of 29 pounds. Approximately what percentage of adult women have weights between 114 and 201 pounds? 2). If 350 adult women are randomely selected, approximately how many would have weights between 114 and 201 pounds?

[cjsed1]

thank you so much, these videos help allot 

[Samantha110882]

Remarkable initiatives Khanacademy and CK12.org, Khan academy provides free videos for K12 and CK12 provides content, flexbooks for K12. Their approach to explain concepts is extraordinary.

[VTOXIICXCLOWNV]

Hey thanks man you earned me an A on my test your the best!!

[omabdulaziz100]

You are amazing

[lucyson0223]

LOL...MICE 

[paulceltics]

i love these c12 problems

[876naenae]

@pongman how can u compare him 2 "a god" there's only 1 true and living GOD anyway! THIS HAS BEEN REAL HELPFUL, thank you very much. I've even subscribed to you :) Keep it up. God bless =]

[rafaelhsouza]

@876naenae Jupiter!!

[LuceroAnai]

great!

thanks men

[nataliyaaa]

at 06:33 you say that 68 / 2 = 32, well, its 34.

[LuceroAnai]

no

he said 100-68=32

and 32/2=16

[HowAboutSomeTruth1]

Just a bit confused, how does 1.1 gram plus 9.5kg equal 10.6kg :/

[shazaduh]

It's actually 1.1kg.

[ritesh024]

@HowAboutSomeTruth1 its 1.1 Kgrams

[lcid99]

Incredible, I understand. Why do others make it so hard?

[riccati2012]

This is an outstanding UTube series.

[haloapa]

lol! 9.5g...

[btypirate]

Sweet. Now I only have to remember 68, 95 and 99.7 =)

[violajean]

thank you

[zackalphaomega]

this man is a teaching god

[frostheat246]

@zackalphaomega lol

[waterlily716]

normal distributions ftw :)

[frostheat246]

im glad you teach this stuff now are you a teacher or is this for fun

[pongman]

He's more than a teacher. He's a god.

[MatrixOfDynamism]

your concept of a god sure is limited.

[pongman]

I'm thinking in terms of the way the Greeks and the Romans used the term in ancient mythology which I feel is a better use of the term. I'm sorry but I can't fathom the term as used by religious zealots. I'm not putting you down for your beliefs but for me I prefer the limited connotation. I really don't believe in fairy tales. Lol, I was reared a Catholic but got over it.