Intro to Probabilities Part 1

An AP Statistics lecture introducing probabilities, randomness, Law of Large Numbers, Probability Model, Tree Diagram, 5 Rules of Probability,etc.

[aprilcrawley]

I've been watching your videos to supplement the in class lectures. Being an older student that has been out of school for quite some time, your videos simplify the concepts and make it easier to comprehend.

[profrobbob]

You are so welcome...and I hope my channel will continue to help...share my channel with your friends, I grow through your support:)) (and I hope to see my videos on your playlist soon!)

[profrobbob]

Thank you for your feedback. I write in cursive. I hope you still find my videos useful.

[tricia]

Thank you for teaching me. I am taking a hybrid course and we only meet once a week, which makes it difficult to grasp some of the concepts. I appreciate your efforts.

[peoples]

Thank you so much for your videos. My Professor has an Russian accent and I did not take Statistics in high school 35 years ago.

[profrobbob]

:) Thank you for watching...I hope you do great in your class!!!

[blueairofheaven]

I've already informed my entire class about your videos. They seemed to like it, keep it UPPP!
:)

[profrobbob]

@blueairofheaven THANK YOU!!!! I really appreciate it:)

[profrobbob]

There is a video introducing significance testing...and any video that says test...z test...t test will have a hypothesis statement to start the problem. If you have suggestions on the video names to make them easier to search as you watch them I will make adjustments.

[profrobbob]

I have a shirt that says that too..hahaha:D
Thank you. And thank you too for subscribing...I grow through the support of subscribers and viewers like yourself!

[profrobbob]

I hope that means you actually learned something too:)...My goal is to "Make Math FUN" while learning, how's it working for you so far?

[TheDataScienceLab]

I always appreciate knowledge. You have explained this concept very nicely. It was really helpful, your examples were too good.
Thanks for uploading such a wonderful video.

[Aznjen]

Hey Prof. Rob! I just found your videos and they seem to be really helpful! Thank You! Currently i am in an AP Stats class, and well i seem to understand the topic but i do get confused in some points (and my teacher really is no help, sorry to be blunt about it) but anyways, i hope that watching these videos will help me a bit more. However, i have a question regarding the AP test multiple choice. I seem to have a very hard time answer the Multiple Choice questions, do you have any tips for me to do better? Are there any online AP questions that pertain to specific chapters/topics? 

[sprmel]

My teacher says that to find the probability of A & B you have to use the formula P(A&B)=P(A)xP(A|B) if the events are not independent. And the second part of the formula P(A|B) means the probability of A when B has occurred.
But how do you solve those? Do you just follow the tree graph? Or how do you you use the formula P(A|B)= P(B&A)/P(A)???? <that's what he gave us

[robynlillies]

Great videos! I have my exam next week and really have struggled with stats where do you recommend I spend the most time studying.. on line course ~thank-you again

[mdenzo]

I have have now found the complete question, it goes, There is 60% chance that project A will make a profit of $100 000 and a 40% chance of making $40 000.Project B will either make a profit of $220 000 or a loss of $20 000.
The decision maker uses the expected value criterion.The probability of project B making a profit of $220 000 that would make the decision maker indifferent  between the two projects is, ?, , , , (3 D.P)

[mdenzo]

prof, a while ago i come across this question in an exam and failed to answer it, i am hoping you might help me out.i dont remember its complete context but i have some fragments of it from my memory.here it asks;    a company has two projects it must choose from,
project A has 60% probability of making a profit of $100 000 and 40% of making a profit $20 000.
project B can make $200 000 and $ 50 000 loss.if management chose project B, what is the probability of making $200 000 profit??

[AndroidiApp]

The writing looks nice but is confusing to read in this context - clear print rules OK!

[husseinalhadi]

What book do you recommend getting for AP stats?

[profrobbob]

As I very much appreciate such nice comments! Subscribers like you are the reason I continue to grow my channel. I hope you will continue to watch and find these videos helpful:) And please share with your friends too, Thanks.