- Видео 29
- Просмотров 287 856
xan mos
Филиппины
Добавлен 16 мар 2020
a university faculty member, teaching Mathematics & Statistics courses
📩 xmosupd2016@gmail.com
📩 xmosupd2016@gmail.com
Introduction to Survival Analysis
This video begins with the Kaplan-Meier curve, followed by the Log-rank test. Finally, standard Cox regression as well as its proportional hazard assumption is introduced.
Data sets may be downloaded at drive.google.com/drive/folders/1rh5jBaWfldoA62eVyluxghZQ-jrUFdkJ?usp=sharing
Video chapters:
0:00 Introduction
2:25 Sketching a Kaplan-Meier curve
6:38 Log-rank test (manual calculation)
34:26 Hazard ratio and Cox regression
56:44 Proportional hazard assumption
Data sets may be downloaded at drive.google.com/drive/folders/1rh5jBaWfldoA62eVyluxghZQ-jrUFdkJ?usp=sharing
Video chapters:
0:00 Introduction
2:25 Sketching a Kaplan-Meier curve
6:38 Log-rank test (manual calculation)
34:26 Hazard ratio and Cox regression
56:44 Proportional hazard assumption
Просмотров: 669
Видео
Normal Probability Distribution
Просмотров 3,3 тыс.2 года назад
This video is about the normal probability distribution, from finding probabilities involving standard normal distribution to finding z (given probabilities). Finding the p-value in a standard normal distribution, as well as generating the critical values for z-tests were also discussed. At the latter part of the video, applications to word problems were given. Link for the normdist.pdf: drive....
Tests of Independence [χ^2 test (incl. Yate's continuity correction) and Fisher's exact test] in R
Просмотров 1,1 тыс.2 года назад
This video begins with the use of the Chi-square test of independence, followed by some suggestions (Yate's continuity correction and Fisher's exact test) when there are expected counts less than 5 (in more than 20% of the total number of cells). Link of research article by Kim (2017): www.ncbi.nlm.nih.gov/pmc/articles/PMC5426219/pdf/rde-42-152.pdf Data sets and handout (in pdf format) may be d...
Inference involving Proportions [z-test for proportions & Chi-square test of homogeneity] in R
Просмотров 1,2 тыс.2 года назад
This video begins with the manual calculations and concepts the z-test for single proportion and two proportions, as well as the Chi-square test of homogeneity. Use of R (or RStudio) are demonstrated at the latter part. Data sets and handout (in pdf format) may be downloaded at drive.google.com/drive/folders/1rh5jBaWfldoA62eVyluxghZQ-jrUFdkJ?usp=sharing Video Chapters: 0:00 Intro 0:13 Overview ...
Analysis of Variance [Fisher's, Welch's & Repeated Measures, incl. applications using R or RStudio]
Просмотров 1,7 тыс.2 года назад
This video begins with the manual calculations and concepts of the Fisher's one way analysis of variance. Welch's ANOVA and Repeated Measures ANOVA follow afterwards. Use of R (or RStudio) are demonstrated at the latter part. Post hoc analysis are also discussed, as well as comparison of ANOVA with t-tests for two means. Data sets and handout (in pdf format) may be downloaded at drive.google.co...
Inference involving Two Means [Student's, Welch's, Paired t-test] including using R (or RStudio)
Просмотров 2 тыс.2 года назад
This video begins with illustration on situations where Independent t-tests (Student's, and Welch's), z-test for two means and Paired t-test are applied. It is followed by real-life examples and demonstrations on how performed in R (or RStudio). Data sets and handout (in pdf format) may be downloaded at drive.google.com/drive/folders/1rh5jBaWfldoA62eVyluxghZQ-jrUFdkJ?usp=sharing Video Chapters:...
Introduction to Hypothesis Testing: Statistical Inference involving μ (One-sample z-test & t-test)
Просмотров 1,7 тыс.2 года назад
This video introduces concepts of statistical inference. Examples are given on how manual computations are done, as well as on how to perform the statistical tests demonstrated using R or RStudio. Data files and handout (in pdf format) may be downloaded at drive.google.com/drive/folders/1rh5jBaWfldoA62eVyluxghZQ-jrUFdkJ?usp=sharing Video credits to: 1. Introduction to the t Distribution (non-te...
Normal Probability Distribution [using pnorm and qnorm functions in R (or RStudio)]
Просмотров 2,8 тыс.2 года назад
This video is about the use of pnorm and qnorm functions in R (or RStudio). Video Chapters: 0:00 Intro 0:22 How to Install R 1:15 The pnorm function 3:28 The qnorm function 6:36 Getting the p-value using the pnorm function 7:24 Answering word problems using the pnorm and norm functions 10:10 P(X = x) = 0 11:14 Short exercise
Descriptive Statistics using R (an Introduction)
Просмотров 1,2 тыс.2 года назад
This video is about basics of R, from creating an object (vector) to importing tab-delimited and excel file where descriptive statistics are computed from. Descriptive statistics are generated using R. At the end of the video, the use of aggregate function is demonstrated. The sample1.txt and sample1.xlsx file may be downloaded at drive.google.com/open?id=1rh5jBaWfldoA62eVyluxghZQ-jrUFdkJ. Begi...
Study Designs in Medicine
Просмотров 1,1 тыс.2 года назад
This video gives an overview of Study Designs in Medicine, such as the Basic Studies, Observational, Experimental, Systematic Review and Economic Evaluation. Examples are given at the end of each study design. Reference material: www.ncbi.nlm.nih.gov/pmc/articles/PMC4318396 Videos credits to: (1) Biostatisticians: Do You Know What They Do? | TomorrowsMed ruclips.net/video/5A0lg3p6pvI/видео.html...
Descriptive Statistics using Microsoft Excel (including the Analysis Toolpak)
Просмотров 3,9 тыс.4 года назад
This is a continuation of the video Descriptive Statistics (ruclips.net/video/UqcYqNfjFis/видео.html), showing how to use Microsoft Excel in calculating the Measures of Central Tendency, Other Position, and Variability. Analysis Toolpak was also used in calculating the Descriptive Statistics. Link about the 9 ways to calculate the Percentile (Quantile): www.rdocumentation.org/packages/stats/ver...
Descriptive Statistics [Measures of Central Tendency, Other Position, and Variability]
Просмотров 11 тыс.4 года назад
0:00 Introduction This video is about the common descriptive measures, such as: Measures of Central Tendency 00:15 • Mean 00:21 • Median 07:04 • Mode 16:49 Measures of Other Position 20:10 • Quartile • Decile • Percentile Measures of Variability 30:58 • Range 31:14 • Interquartile Range 32:13 33:51 Creating a boxplot 35:26 Detection of outlier using quartiles • Mean Absolute Deviation 38:46 • V...
Introductory Concepts in Statistics
Просмотров 7 тыс.4 года назад
This is an introductory video about statistics. Topics include the definition of statistics, graphs, and differentiation of Descriptive vs Inferential Statistics, Population vs Sample, Parameter vs Statistics, and Variable vs Constant. Levels of measurement were given emphasis at the end of the video. Chapters of the video: 0:00 Introduction 0:14 Definition of Statistics 1:00 Descriptive and In...
Classification Models Using RapidMiner™
Просмотров 16 тыс.4 года назад
This video presents how to perform classification models in RapidMiner™. An example using Decision Tree is demonstrated in the video. The Adsapproval.xlsx may be downloaded at drive.google.com/open?id=16JaoMftvKJPxHw9CMueV_kdFQ4FSgm4k
Applications of Modular Arithmetic
Просмотров 27 тыс.4 года назад
This video demonstrates applications of modular arithmetic. 0:00 Introduction 00:24 Verification of ISBN (International Standard Book Number) 05:51 Verification of UPC (Universal Product Code) 08:36 Validation of credit card number [Luhn algorithm] 11:57 Identification of the day of a given date using the Zeller's congruence Video links of the clips used: 1. 11.11.11 | Numberphile ruclips.net/v...
Modular Arithmetic and Modulo Congruence
Просмотров 36 тыс.4 года назад
Modular Arithmetic and Modulo Congruence
Reasoning: Validating Arguments using Binary Operations
Просмотров 13 тыс.4 года назад
Reasoning: Validating Arguments using Binary Operations
The Language of Mathematics and Symbols
Просмотров 45 тыс.4 года назад
The Language of Mathematics and Symbols
Receiver Operating Characteristic (ROC) Curve Analysis for Optimal Cut-off in Disease Identification
Просмотров 16 тыс.4 года назад
Receiver Operating Characteristic (ROC) Curve Analysis for Optimal Cut-off in Disease Identification
Binary Logistic Regression using R (or RStudio)
Просмотров 7 тыс.4 года назад
Binary Logistic Regression using R (or RStudio)
Correlation and Simple Linear Regression using R
Просмотров 2,6 тыс.4 года назад
Correlation and Simple Linear Regression using R
Quick Review: Conditional Probability
Просмотров 1,1 тыс.4 года назад
Quick Review: Conditional Probability
how to contact u?; Tnx
My email address is in the channel description. Thank you
Very useful, clear explanations. Thank you.
Thank you! Well explained
Thank you so much. It's amazing. You saved my life..
galing, slayyy
Very helpful. Thanks a lot.
Very well explained. Step-by-step and easy to understand. Thank you
It is very informative video! Thank you for your ❤ tutor!
This is the best explanation and I really appreciate this. It is just fantastic !!!!!!
Do you have the PPT that you slightly show during your youtube presentation available somewhere?
Thank you sir. This was extremely helpful
Thanks for the video, nice explanation. Could you please explain why the values of J in ID's 19 and 20 are neglected? They have the highest J indices...
I'm sorry I meant the J indices at 17:39 min. ID 19 has J = 0.798 and ID 20 has J = 0.909. Still, ID 12 with J = 0.616 is chosen as the cut off.
@@NishantSewgobind Oh that one. In ID 19, Sens = 0.0909 and Spec = 0.889, so J index is 0.0901 + 0.889 - 1 = -0.02 (not 0.798), while for ID 20, Sens = 0.0909 + Spec = 1, so J index is 0.0909 (not 0.909) . Im sorry about that but i think there was a typo error on those two in the powerpoint i used. THANKS A LOT for raising that concern. I didn't see that. Nonetheless, the Max J index is still the one at ID 12, which J index is 0.616.
@@xanmos aha! Thanks for the explanation, really appreciated 😄👍
Great explanation. 👍
Hi Sir, do you accept statistical analysis for research po? Thank you.
I want to express my sincere appreciation for your efforts in creating this valuable resource. Your commitment to sharing knowledge and helping others understand descriptive statistics using Microsoft Excel is truly commendable. Thank you so much!
I particularly enjoyed how you presented the information in a clear and concise manner, making it easy to follow along and understand even complex concepts. Your expertise on the subject matter truly shines through, and I found myself engaged from start to finish. Thank you!
The content was incredibly enlightening and provided me with valuable insights on concepts of statistics. I look forward to watching more of your videos in the future and continuing to learn from your expertise.
Thanks a lot sir, this is a very big help for me. This is an advance learning for me for our next class about ms excel. Keep making a lot this kind of video sir.
This video is a big help for us as we explore statistics. I will watch it over and over again as my reviewer. Thank you, Sir!
I'm not really good with statistics. But thank you for this video, Sir, because this will serve as my guide in doing our research. This will also help me understand the concept of statistics, particularly descriptive statistics.
It's a very big help for us to learn about this sir. Thank you sir and keep making this kind of videos.
Thank you, sir! I found my guide in calculating the Measures of Central Tendency, Other Positions, and Variability. Also, the Analysis Toolpak in calculating the Descriptive Statistics will be of help to me in the future. Not really good with MS Excel that's why this video will be very useful to me.
Easy to understand, very informative.
Very helpful ❤️
This video helps my understand the concepts of statistics it proves to be highly informative and remarkably conducive to effective learning..
Since I'm not good in using excel, but you sir taught what to do and I understood easily. Thank you, sir!
It's fun to go back to the mean, median, mode like you're in senior high. Thanks a lot sir for this nice and instructive video!
This is really a big help for us to develop our critical thinking and analytical skills. We learned a lot from you, thank you sir!
Astilan mura jud ug nag kuan oh 🙄 bang suko HAHAHAHAH
Thank you for demonstrating to us the Descriptive Statistics using Microsoft Excel sir, (including the Analysis Toolpak). it is straight forwards explanations and example. Thank you! ESCOBIDO, EDZEL P. BSBA FM - 3 ✅ Done
After watching this, I deeply realize how important Descriptive Statistic is. It further enlightens me about this topic. God bless sir and more powers to come! ESCOBIDO, EDZEL P. BSBA FM - 3 ✅ Done
MS Excel is very essential nowadays especially in business industry. To be honest, I’m not good with this but will try by best to learn and improve more. It’s very helpful for us beginners with this tutorial. Thank you!
As an average student, what I need right now is dedication to learn this topic. This would be a big help for us especially we have a research. Thanks a lot, sir!
Keep sharing your valuable tips, learning a lot from you. Thanks.
Keep sharing your valuable tips, learning a lot from you. Thanks.
This lecture is also tackled by my professor, and all I can say is that everything we do is connected in statistics. t's like how we budget our allowance is also part of statistics.
I learn more from your videos
A pleasant day to each and everyone. I must say that this lecture helped me a lot in terms of understanding the truth behind Statistics in our world. It is indeed that through the years, everything evolves over time, and that include Statistics. Thank you so much Sir for this informative lecture. ESCOBIDO, EDZEL P. BSBA FM - 3 ✅ Done
We can’t deny the fact that stat is everywhere. Therefore, stat is part of our daily lives.
What's the difference between descriptive and inferential statistics? Descriptive statistics summarize the characteristics of a data set. Inferential statistics allow you to test a hypothesis or assess whether your data is generalizable to the broader population
Anyway it’s excellent to learn and understand underpinning knowledge in ROC and cut off determinations
Can i share that SPSS can now calculate younden’s index or J stat Used SPSS V29
thank u. I just got spss trial version and yes, there’s youden index already 🥳
This is the best explanation of Co and ROC I came across Very good basic math and statistics foundation combined with good examples Many thanks
Just started to learn R. This is so helpful thank you. Very clearly explained.
Thank u. I hope u have time to browse my Biostatistics playlist. As all common statistical tests are there. You may take a look at it at ruclips.net/p/PL2C53YS1opmok4jqg_568gPnwFja6Zds2.
Thank you so much
thank you so much!! You explained this so clearly, understandably and thoroughly! thanks a lot
Short but concise :) More Power Sir
could you demonstrate how to add two graph curve?
It can be done using the pROC package in R or RStudio (not using optimalCutoff package). Thank you for watching and appreciating my work. :)
Good day. I would like to ask for your help. If I want to calculate the sensitivity and specifity for a different cut-off point, how do you run it in R using the same package? Thank you for your help in advance
Thank you so much for this video. You help me a lot in writing my proposal. It is going to help me a lot in my project. May God bless you abundantly. Gracias