Probability density functions (KristaKingMath)
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- Опубликовано: 25 авг 2024
- ► My Applications of Integrals course: www.kristaking...
Learn how to identify a probability density function and find the probability that x falls on a particular interval.
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If you could use some extra help with your math class, then check out Krista’s website // www.kristakingm...
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Hi, I’m Krista! I make math courses to keep you from banging your head against the wall. ;)
Math class was always so frustrating for me. I’d go to a class, spend hours on homework, and three days later have an “Ah-ha!” moment about how the problems worked that could have slashed my homework time in half. I’d think, “WHY didn’t my teacher just tell me this in the first place?!”
So I started tutoring to keep other people out of the same aggravating, time-sucking cycle. Since then, I’ve recorded tons of videos and written out cheat-sheet style notes and formula sheets to help every math student-from basic middle school classes to advanced college calculus-figure out what’s going on, understand the important concepts, and pass their classes, once and for all. Interested in getting help? Learn more here: www.kristakingm...
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Krista, you are a GREAT Teacher! The Show must go on! Teach as much as you can. I am your grateful student.
You are AMAZING. I'm taking Exam P/1 at the end of this month and you've been more helpful than any online seminar.
Aww thanks! I'm so glad I can help! :D
jp sartre so how did you do?
@@MikeDunn He ded.
Thanks so much. My lecturer thought this in over 30mins and I was more confused than I went into the lecture theatre. In 7mins you've just delivered me from that confusion
Oh good! I'm so glad it helped! :D
Whoa, you explained that in a step by step and intuitive way. Thank you, I understand PDFs so much better!
That's awesome! I'm so glad it helped!
THIS SAVED ME OMG, thank you so much for explaining so clearly and writing everything out!!!
I'm so glad it helped! :D
Thanks a lot Krista. That was short and informative. God bless.
In 7 minutes I have understood what I struggled to understand for 2 hours. Thank you
I'm so glad it helped! :)
Professor King, thank you for an outstanding video/lecture on Probability density functions.
Very pleasant experience. Vivid view of the solution is awesome without any complexities.
Yay! That's always what I'm hoping for! :)
someone should give this lady a cookie!!! Thanks a bunch, this video helped me so much...
2020, before UC Davis stat 103 midterm. Thank you very much for your help!
You're welcome, Wesley, hope the midterm went great!
Thank you very much.... it is a great and helpful video. I like how you explain it.
Thanks for the help. Essentially a probability density function is only true when it integral between its limits is equal to 1.
Good and clear explanation. Thank you.
Thanks!
Thank you so much! This video helped me understand PDF much better.
Great! I'm so glad it helped!!
Glad you liked it! :)
AMAZING ... re-learnt something today i had forgot .. Keep up the good work .. Thank you ..
You're welcome, I'm so glad you liked it! :D
Thank you very much! The best explanation.
Thanks from Bangladesh. I am now your new subscriber. Your explanation is excellent.
Thank you so much, MD! :)
Thank you so much, can u please make a vid on joint probability density function
Thanks again Krista !!
:D
Thank you so much it is very clearly and well explained!!
I love her a lot. She is an Angel sent to to save me from Probability and Statistics :'D
Thanks for posting this.
Two machines are used for drilling oil from an oil well and their operating times can be marked by random
variables 𝑿 𝒂𝒏𝒅 𝒀. 𝑿 is a uniform random variable on the interval (0, 1) and 𝒀 is an exponential random
variable with parameter 𝛌 = 𝟏, and 𝑿 𝒂𝒏𝒅 𝒀 random variables are given as independent. Analyze the
probability density function of the sum of 𝑿 𝒂𝒏𝒅 𝒀 random variables given as 𝒁 = 𝑿 + 𝒀.
Kindly solve it.
i would think so... but i don't know what you mean by "fun"...
i have an exam tomorrow and you saved me. your voice pretty too!
Good luck on your exam, I hope it goes great!
Here, when you integrated the probability density function, you did not include any X (what I mean is for instance, if we had to calculate the mean, we would have to integrate x f(x) dx from 0 to 1). When do we and when do we not include x when integrating the probability density function? Thank you for your awesome videos.
Nice ... and unique way of explaining
Thank you very much!
Very clearly said and laid out! Thanks!
You're welcome, I'm so glad you liked it!
great video. was really helpful and insightful
I don't know how to thank you really, I am now doing my PhD in stat and If I need any help I go back to your videos thanks
+attract77 You just did! I'm glad I've been able to help along the way.
This has been very useful, thanks!
You're welcome, I'm so glad it helped!
You've made it simple and easy to understand. Cool!
You made it look so easy .. :) Thanks
Woow... I m n love with u...😀
i Got Good Grades in Calculus by Watching these Videos...
and now Probability...
Thanks.
This was a very helpful video. Glad I stumbled across it! Thanks!
:D
just made so much sense
Hi Krista, I love your videos. They are intuitive, practical and clear. Can you please do more statistics videos like poisson,, expected Value, joint density functions, marginal and conditional densitites, mgf, cdf, jointly distributed random variables. Thanks
+JoyousChris8 I'm so glad you like the videos! I will definitely be adding more, and I hope to get to statistics at some point in the future!
THANK YOU SO MUCH
This was so helpful! Thank you so much!!!!
Oh, I just love her voice
Very didactic! Saved my day! Thanks.
What if there is a constant in the f(x)? For example I have f(x)=c/3^x. I found what value of c makes f(x) a valid PDF. So then, to find the probability of P(X< or= to 3) would I multiply the integral of f(x) by the value I found for c that makes f(x) a valid PDF?
Very good lectures, thank you!!!!!!!!!!!
You're welcome, I'm glad you like them!
Helps a lot, thanks!
Awesome! Thanks for letting me know! :)
Thank You very much teacher....
You're welcome!
Thank you, very helpful.
You're welcome, David, I'm so glad it helped! :D
i have been watching your video's for over a year. you explain everything clearly and make it easy to understand . do you have any other channels for algebra and stats?
thank you for all you are doing.
+Ben_freeman You're welcome, and thank you so much for watching my videos! This is my only channel, but I do have a growing algebra playlist, here: ruclips.net/p/PLJ8OrXpbC-BP9hyAHCfjloy8RC7vsULiv
thanks allot for your lecture on probability density function it was really helpful, but after trying allot i wasnt able to solve the following problem i hope you will help me
f(x)=(1/8x 0
Given the function gx(x) = 4 cos(r.x/2b) rect (x/2b) Find the value of b so that ga(x) is a valid probability density function can you answer for this please
Very very useful. Thank you
Riad Darawish You're welcome!
thanks so much. You always come through when patrickjmt doesn't!
please krista could you upload video related to uniform distribution function....
you are the best!!! thank you
Awesome video, thanks!
Thanks! :)
Really thank you for that ☺️
+حمودة يا كبير You're welcome!
Too many thanks ♥️♥️
thanks u r a life saver
you're welcome! i'm so glad it helps!! :D
It is really fantastic video. I just ask if you can help me about the relationship between the autocorrelation and power spectral density. Many thanks.
you're welcome! :)
This was so helpful, thank you so much!
You're welcome! Glad I could help.
Can you tell me : f(x) =2x, 01 be pdf then
1. E(|X |) 2. Pdf of Y = 1/ X
Thank you , great as usuall
Thank you so much!
Thank you!
you're welcome!! :D
thank you so much!
This was so helpful! Thank you so much!!!!!
Thank you for the helpful video
+Austin Texas You're welcome!
+Krista King | CalculusExpert.com What's the meaning of points on the probability distribution function curve ?? I can't get it.
Thanks in advance
great expectation. thank you!!
You're welcome!
Thank You So Much..This was a well illustration
+Sohail khan niazi You're welcome, I'm glad you liked it!
Have you any Facebook page ?
If Yes share that..
+Sohail khan niazi facebook dot com / calculusexpert
Thank You..
Personal Facebok Account ??
that's help a lot. thanks
:D
How do you calculate the PDF if you were given a raw set of data? For example, if I just had a random sample of values 3, 2, 14, 8, 9, 21, 7. What would be the steps to solve the PDF then, instead of starting with a f(x)--function?
that was great, thanks a lot, how would u find if it was between for instance p(0.4
thanks alot you are really healpful
+FAISAL AL-BULUWI You're welcome, I'm glad it helped!
Thank you
you're welcome!
HELPFULL THANK YOU
is probability density fun and prob density fun same?
thanks
Quite helpful.
Thanks. :)
May i have the total videos of probability and statistics for mca
Thanks. This was so helpfull
You're welcome, I'm so glad it helped!!
Thanks from Brazil...
Is pdf or cdf the one using the integral?
well done
Thanks, Sayed! :D
Any other problems/videos on PDF? Thanks.
how would you find the mean?
thx
Move over Khan Academy. This was an excellent and informative video, I will be looking for others like it. Thank you!
+Josh Sartwell You're welcome, I'm so glad you liked it!
Krista are you a university professor? I'm onto my second year of mathematics undergraduate now. Sometimes I see it as a real pain in the ass since I worked a few years and got back into studying without remembering all that much. Your videos cheer me up though because it feels like I'm not even studying since I love hearing your voice, and I actually understand stuff when you explain them. So they're like fresh air after me getting suffocated with confusion from going back and forth between lecture notes and textbooks. This was great, as always!
I'm not a professor, but I'm so glad to know that the videos are helping! I know it can be pretty tough to get back into math after being away from it for awhile, but just keep working through it... you got this! :)
thnx dude :)
very very very good video.
can I ask you which tool did you use for making this video?
Thanks! I explain here: www.kristakingmath.com/blog/how-i-create-my-videos
Thank you. ('ㅂ')/
Great video, can you tell me please, what is the software you are using in your explanation?
+Usama Raed I explain here: kristakingmath.com/my-videos hope that helps!
+CalculusExpert.com It does help, thank you very much.
I like how quickly you went through it, unlike Sam Khan who repeats himself endlessly.
Glad I could help!
lmao.
You should do more examples with trig functions. Otherwise this video really helped
You have a good handwriting
Wow that really helped!
PS: YOU ARE SO PRETTY!
find the density function of the sum of two independent random variables x and y. show that w=x+y? pls solve it it's urgent to me.....................