Statistics Lecture 4.3: The Addition Rule for Probability

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Did it?

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He really makes stats look good too... sometimes I have to rewind and re-watch because I get a little distracted! All kidding aside, very useful videos for this 34 year old mom trying to finish her BA in nursing after 13 years! Makes online stats class much more reasonable to learn!

[@zena101562]

Finally a professor that actually teaches Statistics. Thank you for being methodical, logical and not rushing. Your videos will help me pass. All the professor need to have you teach them methodology to teaching stats. My professor rushes. Rushes through teaching us how to use our calculators. Its frustrating.

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OK I am 50 and back in school.Thank you thank you thank you for making these videos! I can succeed at my online course because of your clear teaching. Bravo

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You re not alone Jeannine. I m 49 and studying again.

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I am in the same situation, only I am 55 and taking an online course as well. These videos have helped me tremendously.

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[@sapphirerose2754]

You were my professor for calc one back in 2015ish, im currently in a probability and stats course and it gets a bit more in depth, pdfs, cdfs, integrating to find expected values, etc. We kind of skipped over all this stuff in a chapter or two and it was what i found most confusing. Thank you for breaking it down, its not as intuitive when you just glance over all the theory in a text book and then see a question asking you to find P(A or B, but not both) especially when your just given the intersection and union symbology NOT at all for me INTUITIVE. Thank you for explaining it in a way that makes sense!

[@jamshaidmushtaq1811]

I didn't quite understand why we put a "AND" term in the addition rule formula before I watched this. Thanks for the very simple explanation! I have become a big fan of your fun teaching style! ❤

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[@pearlylissanu]

23:00 - 32:45 Eliminating the double count (Addition rule) and 59:00

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I live in Italy and here the math teachers all explain in theory, not including one example of practice. We are lucky to have you!

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been watching your lectures since our 1st sem, and now were on our 2nd sem, i was amazed by your lectures. and i just found out today that this lecture was uploaded 12 years ago! i was amazed even more cause your lectures really helped me pass our major subs! thankyousomuch, Prof. Leonard!

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SUPERMAN WISH I HAD YOU AS A TEACHER!!!....YOU DEFINATELY HAVE A GIFT ...Plus you Made me wanna do like 50 ups after your video !

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A actually did a hundred :-)

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professor each time i watch you teach its like am in that awesome classroom of yours,i always received another level of my maths,just wanna say thank you for the good work and your explicit videos have made me to passed my exams.God bless you prof.

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Dear Professor, i have gone through all your stat videos, you are the real Superman of Stat, Big Hug to you.

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how is this guy teaching me probability and soothing me asmr style at the same time all the content please

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[@tombuie6717]

I want to say that I have devoured every minute of these lectures, and that because of Prof Leonard's patience and ability to simplify these subjects, I have cleared up many misunderstanding from my past exposures to statistics. Also, I realized my mistake in my previous posting, and that is that the computation is multiplicative and not additive. The simplest calculation is 1 minus the miss percentage of the first condition times the miss percentage of the second condition. The first calculation is %60 percent female which is a miss percentage of %40 and the second calculation is that the remaining population of 20 males is %15 blond, which is a miss percentage of .85. .60 times .85 is .34. 1 minus .34 is .66 percent.

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if look teacher in the dictionary, you'll see Professor Leonard right on top! Because of you I did great on my first exam!

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Just wondering why someone ever disliked this video? Well-explained, well presented and easy to understand. Thanks professor!

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I have final exam today and I was suffer with probability, I wish I found your video before they are really helpful .. THANK YOU

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[@Peter_1986]

My math teacher in differential equations was like that as well - he wrote down stuff on the board incredibly quickly and talked super-fast so that I almost didn't have time to write down anything. He was asked to slow down a few times, and this worked for a few seconds, lol.

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best man alive

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It's 2020 and your video is still helpful THANK YOU Keep it up

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u r the best teacher ever

[@bubba61200]

Point of clarification... writing and saying 'Found Guilty' and 'Found Not Guilty', instead of just 'Guilty' and 'Not Guilty' would reduce confusion.

[@Invergence_x]

Magnificent Lecture :) He is the perfect teacher

[@ost4p]

Thank you for very clear information! Probably the best teacher ever

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Thank you so much professor Leonard. I wish you make videos on college Algebra.

[@hannahlitwin3194]

Made everything much more clear. Thank you!

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Thank you much your videos to pass my stat exam1.with excellent marks. Looking forward for my next exam

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Is this playlist is enough for student of data Science?

[@liyuanidelgado4625]

the real mvp

[@MrCuteguylol]

25:20 the tone almost makes me wanna hug him

[@jhonen32629]

I was a bit lost on the whole Addition Rule, but you made me understand it. Thank you!

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[@roadtoad3484]

17:25 Does anyone else think that it's kinda messed up that they tried to convict 85 truly not guilty individuals? That would be 85 people who are having to fight for their freedom.

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Mrs.Jaynes, I watched it. This is Johna

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Hello, I love your videos and they are very helpful, but do you have a video on Correlation and Regression? If not, can you please post one. Thank You.

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As back benchers we are tired let's go for break professor it's getting hot 🔥

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so helpful! very efficient prof 👍🏻

[@amithkumars562]

Hey, sir. My name is S Amith Kumar and I am from India. I feel amazed watching your lectures on calculus. Can you please create a lecture on unconditional probability??

[@saiedbeckford3562]

Independent probability you mean ?

[@hermanmokgope3011]

Any book to complement the lecture?

[@cathtg3]

I am just here filling the gigantic gaps my overpaid college professors with several PhD's have in their class. what textbook are you using in this class? i need some problems to practice.

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Thank you professor!

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great lesson

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this guy as the best jokes ever, for real ^^

[@AhmedSa07]

What is the name of the book that you use?

[@gaolahleprudencetokwe5177]

Can you please help with the intersection between "guity" and "didn't do it"

[@weekendresearcher]

what was the name/author of the book used during the lecture?

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This really did help though thank you 🥺

[@leslypalomar-cruz2057]

Is this based on the triola stats math book. If not , which youtuber covers lessons from it.

[@aamirmalik7740]

Dear Mr. Leonard: I have a query regarding your explanation of "Law of Addition" ... as per law the values you chose the calculation would be P(A or B)= P(A)+P(B) - P(A and B) so by inserting values we have P(A or B)= 11 + 72 + 9 - 72 if I am not wrong --- kindly explain if there are same positive and negative values such as +72 and -72 ... wouldn't they cancel each other???

[@Oleena_the_actuary]

You supposed to have it as (11+9+72)-72,you basically need to add up things first then subtract from the total

[@Andre98gv]

What about the 85? Sorry I’m confused

[@joefuentes2977]

Please finish making videos for the rest of all the Math ever

[@tombuie6717]

Regarding the blond or female problem. It seems to me that the computation should be the chance of being female PLUS the %chance of being blond from the remaining male population. But, blonds are not evenly distributed among the females and males. In a population of 50, females would be 30 (%60 of 50,) blonds would be 9 (%18 of 50,) and blond females would be 6 (%12 of 50,) leaving 3 male blonds, which means that %15 of males are blond (3 / .20.) Therefore the probability of blond or females would be %60 chance of being females plus %15 change of being blond from the remaining male population = %75 of being either blond or female. n'est-ce pas?

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Professor Leonards' got Dad Jokes. (Count from Sesame Street, "one, ha ha").

[@maknusagr8agn330]

I know this is a really simple question but its been a while since i took a math course.....when u use the words "or" and "and" in these probability statements. ...if i am writing these out.......... i am assuming they mean the same thing as union symbol and intersection symbol...your just simplifying it so people can read it better? All my quizes i have are formulas and in not english so i want to make sure im translating in my head accurately. Thanks in advance

[@C2H6O_]

daniel maston yes OR means Union & AND means intersection.

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2022 still learning

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What about the twins ????

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watching in 2018

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thank you alot !!!

[@VeniVidiVici3587]

You had to show the Venn Diagrams before giving the court example. It was very confusing.

[@udaysheelzupudi8044]

Can someone tell me the name of the textbook he is using.

[@pearl2825]

TEXTBOOK Elementary Statistics Technology Update 11th Edition by MARIO F.TRIOLA

[@MBvolcom92]

"0.52 what?" "0.520" nice save by that girl! haha

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Coming here after watching his Calc I, II, and III series is a bit weird.

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I wonder where this Statistics playlist fits in with the other courses on this channel. So far, it seems as if it should be tackled after Intermediate Algebra and right before Precalculus.

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İts 2021 im still here gaininh

[@chris222233]

you skipped the last steps in the boy and girl, also before that you put 16/52 = 310 i keep getting 16/52= .307

[@florencekho3574]

Round off 0.007 to 0.01, therefore you get 0.310.

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damn those guns

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33:00

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41:30 That marker sound 0.o

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If he taught shirtless everyone will learn Statistics yall lol. wink wink. :-)

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Back benchers doing their thing here😂😂😂😂