I have done B.S (4 years) from University of Sindh, Jamashoro, Hyderabad, Sindh, Pakistan. But in those 4 years, i could not learn more then this great teacher. Thank you dear sir. Lots of blessings for you.
I have an upcoming Summer Statistics Class and decided to view some lectures online, and have been taking notes with professor Leonard who seems like an excellent Professor. At the same time I was like "I wish Merced College had professors like this" and then I found out he teaches at Merced... mind blown! Small world. Had to rewind like 3 times to make sure I wasn't hearing things!
I have watched the first 3 episodes of your statistics course and I have fallen in love with your personality and teaching style; you really are a superman. thanks for all your efforts
You are a lifesaver. Thank you so much for making this video. I am taking a college class on statistics and my professor is terrible. If I could get away with it I would just watch your videos instead of attending class :)
This prof is the most brilliant teacher of sampling. You clarified issues that my prof failed to do. As I watched I felt as a part of this amazing class.
Professor Leonard isn't just a random dude, he is one of the best math teachers on the Internet. His ratings on "Rate My Professors" are incredible, he has a "Would take again" rating of *100%,* and almost all the ratings have called him "Awesome".
There are still people who are willing to give their best. Leonard is definitely one of them taking all the time to cover the material in a simple easy to understand way.
Thank you! I am learning little in a graduate-level Stats class. I appreciate your straight-ahead and approachable teaching method, use of all caps (which improves legibility), and applicable examples.
I have a B.A. in Mathematics and am an actuary. But I always watch this series once every so-and-so just to stay refreshed although I understand nearly all of it.
Hi John, Professor Leonard's video are extremely helpful as a refresher. I was curious about the actuary profession. How do you like what you do so far?
observation vs. experiment observation - measures specific traits but does not modify the subjects ( polling) experiment - apply some sort of treatment and measure effects on subjects (control and test groups)
English is not my first language. in class , it was so difficult to understand all that stuff. i am so proud now because after this video , i went back to do my homework and i got everything correct. thank you professor, I am NOW ready for my test on .Monday
Sir, THANK YOU SO MUCH! Currently taking online Basic Concepts of Statistics, and I was going through the book like "wth I'm not passing this," then I made the best decision to come look for examples on RUclips, and ta-daa! Actually walked through the book with me and I don't even know what book was being used. LIFE SAVER! Made it so simple to understand!
I once again find myself watching Professor Leonard's videos in the interest of tutoring my own students. I'm starting to feel like I owe him a royalty. Given that his lectures are so efficient and understandable, why would I want to go anywhere else? (I'll conveniently fail to mention him to my students, though)
In the design of experiments, treatments are applied to experimental units in a treatment group, here called test group. In comparative experiments, members of a control group receive a standard treatment, a placebo, or no treatment at all. (This is a Wikipedia definition)
Can I know which book you use for this lecture, sir? This lecture was very good, I used it as complementary to my Statistics subject in my college. Thank you
Very clear run-through of random sampling techniques (I like the deliberate mispelling 'strata-fied'). It would be good to add some instruction on how exactly you randomise, including using the random functions on your calculator and the difference between random and pseudo-random.
Simple Random Sample (SRS) is defined as every subject in a population has an equal chance of being selected. When you chose 5 from each group, that would be stratified sampling.
Professor Leonard, can you let me know which book are you using for the source? I would love to know that and practice some of the problems from the same book
It goes to say that there is no such a thing as random sampling, because the idea of randomness alone can’t survive the very idea of bias. Randomness in many contexts is akin to turning a blind eye on something that must be present to achieve fair representation. This is more so of a case when certain subgroups in the population share major needs, aspirations and conditions. The idea of random sampling may work for material subjects, but not much for humans--another distinguishing factor that should be considered when sampling to achieve good representation of the population. So before considering stratum sampling, the degree of consent on certain characteristics within the subgroup should be accurately assessed. If, for instance, we are trying to find some statistics about the birth rate among the American population which consists of several racial and ethnic groups, we may not hit it right if the birth rate among such different groups varies drastically. By the same logic, if within the same group the birth rate is so drastically different, it may not help much to include such groups in the proposed stratum sampling. In any case, sometimes census is the only way serious parameters could be measured. Voting polls are misleading because the effect of the polls on the election predictions themselves as pointed out that no one would want to vote for a losing candidate. In as much as the idea of inferential statistics is tempting, in many cases, cutting corners is not the way to go. It might be a good idea to employ a hybrid of sampling techniques and averaging them out. This should be no headache with the sophisticated computing power we have due to modern technology. There seems to be no substitute to trying many samples and comparing the results and choosing the ones that represent the population from historic time analysis.
What's the name of the textbook that you usually use for this class? I'm self-learning the introduction to statistics at the moment, and am looking at books to use. Please recommend if you can, thanks!
Edward Burroughs Yes... StratOsphere. The Stratosphere is also ABOVE the clouds. There are no clouds in the stratosphere. That is also what the B-52 Bomber is named after, The B-52 STRATOFORTRESS.
+Shara Naroosh A lot of the time professors will skip sections of the chapters to avoid complete repetitivness or its irrelivent. This professor covers everything you need to pass any class so far as I can tell. I was stupid and believed I could take my statistics course online. I have been struggling untill earlier today when I came accross these lectures. Decided to review from the beginning. Everything seems so obvious now! Amazing what a good lecture can do :P
For "Convenience Sample", you defined it as the use of RESULTS that are easy to get, but shouldn't it instead be the use of the DATA that are easy to get?
some of the lectures are missing from your play list sir like 1.2 and 1.4. However you are fantastic and thanks for sharing these lectures. Ibrahim from Afghanistan
I really enjoyed this video. I have a question and perhaps this is answered in one of the videos sequences, but how many responses much one receive from a survey for hypothesis testing to be accurate?
Really it was better to divide Sampling into 1. Probability sampling that is futher subdivided into a. Simple random, b. Cluster, c. Systematic And the 2. Nonprobability sampling that is subdivided into a. Quata, b. Convinence, c.purposive or gudgement and , self selection.
Could anyone help me to answer this question please? . are stratified samples simple random samples? I get a bit confused at the "Stratified sample" method. It doesnt sound that we are making random samples because if we break the population into smaller groups and pick randomly, for example we have 5 levels of education and each level is one subgroup, then we prioritize to have samples which include all levels of education. It means that you miss out samples which maybe only contains 4 or 3 levels of education. In the beginning, we have a very clear definition for " a simple random sample is EVERY SET OF n individual has an equal chance of being sampled", in the stratified sample we dont let every set has an equal chance of being sampled.
This was a good video. However, I did not see the equations that go with this. For instance, I am stuck on solving the probability of a random sample which I thought was the easiest one. Please help someone. Thanks in advance!
when the professor asked:" how many people understand what I just talked about?" I raised my hand...in front of my laptop.
me too
This playlist saves lives. Love it.
I have done B.S (4 years) from University of Sindh, Jamashoro, Hyderabad, Sindh, Pakistan. But in those 4 years, i could not learn more then this great teacher. Thank you dear sir. Lots of blessings for you.
I have an upcoming Summer Statistics Class and decided to view some lectures online, and have been taking notes with professor Leonard who seems like an excellent Professor. At the same time I was like "I wish Merced College had professors like this" and then I found out he teaches at Merced... mind blown! Small world. Had to rewind like 3 times to make sure I wasn't hearing things!
I have watched the first 3 episodes of your statistics course and I have fallen in love with your personality and teaching style; you really are a superman. thanks for all your efforts
and he makes learning fun.
You are a lifesaver. Thank you so much for making this video. I am taking a college class on statistics and my professor is terrible. If I could get away with it I would just watch your videos instead of attending class :)
This prof is the most brilliant teacher of sampling. You clarified issues that my prof failed to do. As I watched I felt as a part of this amazing class.
East African student
I love paying $600 to take a class where I rely on some random dude on RUclips to teach me the subject.
yup !!!!!!!!!!!
Professor Leonard isn't just a random dude, he is one of the best math teachers on the Internet.
His ratings on "Rate My Professors" are incredible, he has a "Would take again" rating of *100%,* and almost all the ratings have called him "Awesome".
Inbox me,, I'll help you out
$2,500 here lol
Since thus cooties crap. I ha e t gears my instructors voice. The capus is shut down. There is no tutors or help. And Im behind.
look at the arms
There are still people who are willing to give their best. Leonard is definitely one of them taking all the time to cover the material in a simple easy to understand way.
Looks like that class got free tickets to the gun show
Quadzilla99 😂😂
Gross
You teach better than my professors here in France. Thumbs up
I thought it was illegal to have guns on campus, let alone in the classroom?
haha! I actually had a teachers with the last name of Guns...that joke was brought up a lot!
haha
I thought the OP meant the instructor's arms.
This hasn't aged well lmao
@@XanderGouws haha from the thumbnail I looked at the guns...
Thank you! I am learning little in a graduate-level Stats class. I appreciate your straight-ahead and approachable teaching method, use of all caps (which improves legibility), and applicable examples.
I have a B.A. in Mathematics and am an actuary. But I always watch this series once every so-and-so just to stay refreshed although I understand nearly all of it.
John Kim you are gay
Tushar Singh that's disrespect
I only disrespect wahmen
Hi John, Professor Leonard's video are extremely helpful as a refresher. I was curious about the actuary profession. How do you like what you do so far?
You are the superman Professor Leonard.Here, I am learning my all economy lessons that I couldn't learn from my unıversity's teachers.Thank you.
observation vs. experiment
observation - measures specific traits but does not modify the subjects ( polling)
experiment - apply some sort of treatment and measure effects on subjects (control and test groups)
English is not my first language. in class , it was so difficult to understand all that stuff. i am so proud now because after this video , i went back to do my homework and i got everything correct. thank you professor, I am NOW ready for my test on .Monday
Look it's a math teacher, no a statistician....no, he is clark kent (superman)
This is the best lecture I had in statistics.
I'd like to see his lifting stats
Great professor helping with stats right now. Love how detailed he is.
Sir, THANK YOU SO MUCH! Currently taking online Basic Concepts of Statistics, and I was going through the book like "wth I'm not passing this," then I made the best decision to come look for examples on RUclips, and ta-daa! Actually walked through the book with me and I don't even know what book was being used. LIFE SAVER! Made it so simple to understand!
that is how i was before i found his vids.. he is the best.. :) I have saved him for my masters degree stats class.... :)
Thank you for making these videos you are helping me through my college stat class
So attractive and smart.
Congratulations to 500k Subs Professor Leonard!
I once again find myself watching Professor Leonard's videos in the interest of tutoring my own students. I'm starting to feel like I owe him a royalty. Given that his lectures are so efficient and understandable, why would I want to go anywhere else? (I'll conveniently fail to mention him to my students, though)
truly you are a great teacher. I was so blank but now am getting the hang of it..
BING!!!!!!! I GOT IT.... youre going to help me pass my elem stat exam this afternoon !! THANX PROFESSOR LEONARD
Love how well you explain everything! Actually gets me interested in knowing more hahaha
totally watchable at 1.25 speed if any one is in a time pinch !
Pathetic. 2 times or broke
@@spandanganguli6903 pfft, 4 times minimum
truly you are a great teacher. I was so blank on this topic. I just like the easy way of his explanation.
In the design of experiments, treatments are applied to experimental units in a treatment group, here called test group. In comparative experiments, members of a control group receive a standard treatment, a placebo, or no treatment at all. (This is a Wikipedia definition)
Can I know which book you use for this lecture, sir?
This lecture was very good, I used it as complementary to my Statistics subject in my college. Thank you
Found the book?
@@waseemqaffaf5715 Elementary Statistics by Mario F. Triola
Great stats lectures, very informative and concise! But those arms are so distracting! 😂 Keep looking at them instead of the whiteboard
Very clear run-through of random sampling techniques (I like the deliberate mispelling 'strata-fied'). It would be good to add some instruction on how exactly you randomise, including using the random functions on your calculator and the difference between random and pseudo-random.
Okay, we have an atmosphere!
2021 October,just discovered this as I work on my under grad.,he is better than my teacher.
Simple Random Sample (SRS) is defined as every subject in a population has an equal chance of being selected. When you chose 5 from each group, that would be stratified sampling.
can anyone tell me what are the "readings" that the professor is referring to in this lecture? is there any specific book ?
Professor Leonard, can you let me know which book are you using for the source? I would love to know that and practice some of the problems from the same book
It goes to say that there is no such a thing as random sampling, because the idea of randomness alone can’t survive the very idea of bias. Randomness in many contexts is akin to turning a blind eye on something that must be present to achieve fair representation. This is more so of a case when certain subgroups in the population share major needs, aspirations and conditions. The idea of random sampling may work for material subjects, but not much for humans--another distinguishing factor that should be considered when sampling to achieve good representation of the population. So before considering stratum sampling, the degree of consent on certain characteristics within the subgroup should be accurately assessed. If, for instance, we are trying to find some statistics about the birth rate among the American population which consists of several racial and ethnic groups, we may not hit it right if the birth rate among such different groups varies drastically. By the same logic, if within the same group the birth rate is so drastically different, it may not help much to include such groups in the proposed stratum sampling. In any case, sometimes census is the only way serious parameters could be measured. Voting polls are misleading because the effect of the polls on the election predictions themselves as pointed out that no one would want to vote for a losing candidate. In as much as the idea of inferential statistics is tempting, in many cases, cutting corners is not the way to go. It might be a good idea to employ a hybrid of sampling techniques and averaging them out. This should be no headache with the sophisticated computing power we have due to modern technology. There seems to be no substitute to trying many samples and comparing the results and choosing the ones that represent the population from historic time analysis.
u r the best, like real yur work helps me much better, THANK U ND GOD BLESS U
I have learned from him, can listen to him and can watch him all day long. Totally a cutie.
What's the name of the textbook that you usually use for this class? I'm self-learning the introduction to statistics at the moment, and am looking at books to use. Please recommend if you can, thanks!
Elementary Statistics by Mario F. Triola
Please, how do I get the text book to read 1.4 and also take part in the assignment.
he looks great and sounds nice. Thank you for the easy explaining I am trying to be prepared for a test.
You become my favourite teacher ❤️
bhaisaaaab ! ! ! that bicep and shoulder ! ! !
It's strat-O-sphere and strat-I-fied.
Edward Burroughs Yes... StratOsphere. The Stratosphere is also ABOVE the clouds. There are no clouds in the stratosphere. That is also what the B-52 Bomber is named after, The B-52 STRATOFORTRESS.
A great teacher! I'm glad i fell on his videos.
.
THANK YOU
STARTED REPEAT WATCHING 1.1 2 3 5....ETC
.
Thanks Prof. Leonard! This helps a TON!
clark kent indeed
My god he is excellent at teaching
Time to study stats i'll try my best Professor Leonard
Dear Professor Leonard,
I couldn't find Statistics Lecture 1.4 :( Could you please upload that?
Thank you.
+Shara Naroosh A lot of the time professors will skip sections of the chapters to avoid complete repetitivness or its irrelivent. This professor covers everything you need to pass any class so far as I can tell. I was stupid and believed I could take my statistics course online. I have been struggling untill earlier today when I came accross these lectures. Decided to review from the beginning. Everything seems so obvious now! Amazing what a good lecture can do :P
For "Convenience Sample", you defined it as the use of RESULTS that are easy to get, but shouldn't it instead be the use of the DATA that are easy to get?
some of the lectures are missing from your play list sir like 1.2 and 1.4. However you are fantastic and thanks for sharing these lectures. Ibrahim from Afghanistan
Mohammad Ibrahim Hazara تمام درس هاي اش است بيين به دقت
@@sameersalihy7546 دوست عزیز سلام. مه به لیست درس ها رفتم و دیدم بعضی از لکچر ها نیست. تشکر سمیر جان ولی استاد جواب نداد حتما چک نکده
How could you be like that, you are fantastic sir ❤
what book is he referencing from?
this is what we meant by conducive learning environment. I might be returning my interest on learning statistics... hehehehe
Superb professor Leonard...I loved the his way of Teaching...Leonard can you help me to which book i need to refer.
@4:55, control group is the untreated group.
i love his teaching
Hello Professor Leonard, Can you please let us know the book your using for this class ?
Aravind Elumalai
Name of the book is:
Elementary Statistics - Triola
@@vineetjhaveri3914 Thanks Vineet 😊. Can you also help me with probability book? Which one I should buy?
I really enjoyed this video. I have a question and perhaps this is answered in one of the videos sequences, but how many responses much one receive from a survey for hypothesis testing to be accurate?
such a great teacher. .
Hello. Please share the reading material that you are referring to for this course.
Thanks in advance
Elementary Statistics by Mario F. Triola
I have a group of random numbers but I will like to know how to calculate so I can get what next random number to appear
Thank you for the lecture.
wonderful explaining. THANKS SO MUCH
OMG!! Que hombre tan lindo. Cannot stop looking at his arms. I wonder how he looks like today. By the way his explanation is very good.
im waiting for bro to drop the workout routine fr
Really it was better to divide Sampling into 1. Probability sampling that is futher subdivided into a. Simple random, b. Cluster, c. Systematic
And the 2. Nonprobability sampling that is subdivided into a. Quata, b. Convinence, c.purposive or gudgement and , self selection.
Nothing stiff and starchy about this man. Not your stereotypical maths professor. Cool dude.
Perfect professor!
i liked the explanation...on the samples
@proffessor leonard : systematic sampling from Vietnam draft. "1, 2, 3, Marine!"
Could anyone help me to answer this question please? . are stratified samples simple random samples? I get a bit
confused at the "Stratified sample" method. It doesnt sound that we are
making random samples because if we break the population into smaller
groups and pick randomly, for example we have 5 levels of education and
each level is one subgroup, then we prioritize to have samples which
include all levels of education. It means that you miss out samples
which maybe only contains 4 or 3 levels of education. In the beginning,
we have a very clear definition for " a simple random sample is EVERY
SET OF n individual has an equal chance of being sampled", in the
stratified sample we dont let every set has an equal chance of being
sampled.
I wonder haw many people have watched this video while being in an upper level statistics class?
stats this stats that, what are the stats on those gains prof?
What book are you using? From what I can tell, it seems to be along the same lines as my current textbook
LoriliHime
Name of the book is:
Elementary Statistics - Triola
does it actually has to by equal probabilities for it to be random ?
Great lecture.. thank you
What book is he referring to when he gives homework?
thankyou for the lecture sir .
What is the book recommended by Professor Leonard?
where is your shirt that you wore in first lecture...?
This was a good video. However, I did not see the equations that go with this. For instance, I am stuck on solving the probability of a random sample which I thought was the easiest one. Please help someone. Thanks in advance!
So helpful! Thank you!!!!!!!!!!!!!!!!!!!!!!
@ProfessorLeonard Do you have a video on graphing? excel?
Sorry sir
But I didn't get the cluster sample
Would u plz tell an example.
I am confused because I have a math problem that is asking the probabilitu of a random sample. Can anyone help
My mom: what did you learn in class today?
Me: I think I might be gay.... 😂😂😂
Tf?
omg he's viral on Imgur
Clark Kent is a professor by day
sir, which book do u follow?
vishal raj Name of the book is:
Elementary Statistics - Triola
professor leonard can like... get it.
the best !