Statistics
1. Range, variance and standard deviation as measures of dispersion | Khan Academy
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2. Statistics 101: Understanding Z-scores
https://www.youtube.com/watch?v=bUu5HIHIrRw
This Youtube channel has very good Statistics content. You can watch other Stats related content as well.
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Posted on 27/August/2020
3. Null Hypothesis & Alternative Hypothesis - How to frame a Null Hypothesis statement from a given statistical statement.
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Posted on 27/August/2020
When we are studying about Null Hypothesis, one very important part we should learn is -
When should we reject the Null Hypothesis ?
When should we accept the Null Hypothesis ?
.
.
.
Here, he has explained that part [ Graphically ] . Also, confidence interval of 95% ( what does that mean ) and Significance level of 0.5%, explained.
Statistics 101: Visualising Type I and Type II Error
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Posted on 03/Septeber/2020
Understanding Z - Score
Description : -
So, it is important to understand that Z score is used to find distance from the mean and also it is used for finding probability of an event.
Relation between Z score and Probability is explained here very nicely, in the Link below.
Complete explanation in the Links >>>
Few things I am adding from my Notes.
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Posted on 04/September/2020
When we do Hypothesis testing we get a lot of lot of cases wherein the distribution is not Normal.
In those case, what needs to be done - Explained in Link below.
* https://blog.minitab.com/blog/understanding-statistics-and-its-application/what-should-i-do-if-my-data-is-not-normal-v2
* https://blog.minitab.com/blog/understanding-statistics-and-its-application/what-should-i-do-if-my-data-is-not-normal-v2
T - Test
So, if you would like to clear the concept of T - Test, you can refer these links :-
T- Test has a lot of internal concepts.
Everything is inter-related so it is imp. to cover all related concepts.
* 1 Tailed test
* 2 Tailed test
https://stats.idre.ucla.edu/other/mult-pkg/faq/general/faq-what-are-the-differences-between-one-tailed-and-two-tailed-tests/#:~:text=For%20example%2C%20we%20may%20wish,mean%20significantly%20less%20than%20x.
This is a good link, it helped to clear that concept.
Then again,
* 1 sample T - test
* 2 sample T - test
* Paired T - test
Follow the complete playlist of this Youtube Link its quite important >>>
https://www.youtube.com/watch?v=dDsKP7wVpzM&list=PLIeGtxpvyG-IZRHcZcOy12jp7ywuRbE7l&index=11&ab_channel=BrandonFoltz
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Posted on 06/September/2020
Understanding P - Values
To understand Z - Test, T - Test and Hypothesis testing the best way according to me is to understand how to do it manually using the Z table and the t - table.
After you learn to use it correctly with table >> after that we can directly use the python formulas.
See this is how Z table looks like :-
Link >>>
https://www.ztable.net/
Use this to solve numericals and then move to python formulas.
Some links to clear the concept of p - values.
* Part 1
* Part 2
Very Very important Video [ must watch ]
Other related links to clear concept of Hypothesis Testing :-
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Will keep adding more material as we go ahead in the course and come across very important material via links.
I add Links which I have personally viewed and easily understood the concept.
The purpose here is that for any concept, - Find the Links that are Goood Easily and Quickly.
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