Saturday, November 30, 2013

15. H.B.


Sudah tua setahun lagi.

=.=

Update: 
Really thanks for all the people that wished me. Really appreciate it.
To that person who has some 'ways to check'. Thanks! Haha.

This year I celebrated my birthday. With reading books and watching movie. At home.

=.=

Thursday, November 28, 2013

14. Metropolis-Hastings Algorithm

Currently I'm working on my project that involves Monte Carlo Simulation.
The problem is: I'm not good at it.
I'm working at it for almost 2,3 months.
Probably I'm... stalling? because lazy is a strong word. =.=

One of the algorithms that I need to use is Metropolis-Hastings algorithm.
I found this picture when I wikipedia-ing the algorithm info.


The result of three Markov chains running on the 3D Rosenbrock function using the Metropolis-Hastings algorithm. The algorithm samples from regions where the posterior probability is high and the chains begin to mix in these regions. The approximate position of the maximum has been illuminated. Note that the red points are the ones that remain after the burn-in process. The earlier ones have been discarded. Source: Wikipedia

I don't know why.
But I think this is one of the most beautiful picture in the world.

Probably it looks like the knowledge of everything intertwine as ONE. Gorgeous~~

p/s: Suddenly I have a strong feeling to dig in more about this algorithm.

13. Empty field -> Hospital

There is a huge empty field, in front of my house, that only full of grass and beautiful big trees. I believe everyone including the animals live in there are happy with that empty field.  After 25 years starting from the day I was born, finally the 'owner' of that empty field decided to make use of that field.

What he's gonna do?
I told you in the title...
Yes, he decided to build a damn hospital in front of my neighbourhood area after freaking ...25 years. Come on... after 25 years???
In the last 25 years, why choose now?
When my mom told me, I didn't believe it at all. And I'm not happy too.
But today, they have completely surrounded the whole area with the metal barrier thingy.

I can foresee he will chopped down all the big trees that protected us from the sun and we will have a very noisy construction noise soon. Ugh. Damn it.


p/s: Probably they thought Hospital Besar Kuala Lumpur which is situated 4.9 km (12 mins) away from our house is NOT close enough. Thanks a lot.

Wednesday, November 27, 2013

12. Cashier

I was assigned by my aunt to be a cashier yesterday.
Well, it was an easier job than making a drink.
I still don't get it why customer haven't puke after drinking my teh tarik..
Let's hope they won't get diarrhea...haha.
One thing I don't like about being the cashier is using the system.
The system is a bit messy and the word is too small! Urgh.
Another thing I hate is counting coins especially the new coin and old coin.

The noble statement issued by Bank Negara:

"This series of new coins are smaller and lighter making its more user-friendly for the public. The yellow and silver coloured coins and the edge designs enable the public and also the visually impaired to identify and distinguish the different denominations... "
User-friendly? Wut?
I almost laughed when our PM said it is a good move for blind people because it will be easier for them to distinguish between the currency values. Hello, they need to learn back how to compare the coins, how is it easier??? Maybe I'm a bit prejudice toward him but I feel whatever what he did and do, or issue is stupid.


Yesterday, I had two funny cases.
One, a group of customers were paying their bill.
I think more than 5 or 6 people.
So I read each items in the system for them because we're afraid we will key-in wrongly.
They 'took' that opportunity to ask me lot of questions.
"Why your dad is not a cashier today?" "Do you still studying?" "Are you having a holiday?" 

In the middle of counting the money, they also asked a lot of questions and making me difficult to concentrate.
I'm just smiled and waved. LOL.

Two, one handsome guy was paying for his bill.
We will usually ask," Are you a member?"
Every member entitled to 25 percent discount.
He said no but he lives in the apartment.
Then my aunt said no discount will be given.

After I'm finished printing the bill and counting the money, then he said,"Oh but I'm working in Prudential" after looking at the Member chart.
I was like... O.O
Why didn't you say so earlier???
Once you're done printing the bill, the system will automatically record the data. Kinda mafan to reverse it back.
Fine, since you have that kind of innocent look...I asked my aunt to reverse it back...Haha.
He waited quite long.
I don't think he will come again.  LOL.


Tuesday, November 26, 2013

11. Hundred Statistical Tests




In statistics, we have countless of tests to perform on the data.
But what kind of  test to use? 

What kind of test for what kind of data? 
Under what condition, the test can be performed?

This book will serves as a guide book for young statistician and the user of statistics.
User is, of course, required to know:

1. What kind of data that they are usinglinear or circular data?
2. Amount of sample for testing1 sample, 2 samples or many samples?
3. Using parametric test or non-parametric test?

Most of the tests will be using hypothesis testing to test mean, variance, median, randomness or distribution. Last but not least, user is expected to know whatever to use one or two-tailed test before the test is even conducted. This is crucial for making a right decision.

I randomly pick one of the pages to serve as a sample. This test is used to investigate the difference of the means for two populations. In this example, the author wish to find: Is there a difference between average of two pack of potato crisps (in term of weights)?




Well, good thing you don't have to read through all the statistics books just to find the test you want. Honestly, this is one of the good statistics book because the author gives brief objective of the test at the beginning, the limitations of the test, methods (including test statistic and statistics table), example that related to real life application and lastly numerical calculation at the end of the test. This book has few setbacks such as the example is made to be as simple as possible and the full data is not there, but this will not prevent user from understand the test.

p/s: I think as a statistician, one must know what kind of  test that need to perform on the data, how to derive a simple test statistic like the example above and most importantly making a right decision.

Monday, November 25, 2013

10. Statistics

I never liked Statistics in the first place when I first studied it during Form 4, 5 and 6, especially the part Combination and Permutation. I love Mathematics more.

But here I am...doing Master of Mathematical Sciences major in Statistics. After (almost finishing) Master, I realized I don't really like Mathematics. Too abstract. 

After studied Statistics for five years ( three years in Degree and two years in Master), I'm quite curious to know how many things that I learnt. So, I check the Wiki to know what area that I have covered...

My check list:



The black line is the part that I have covered and the red circle is the part that I specialized in.

For Descriptive Statistics,
 I almost done all.

For Data Collection,
 only left the Statistical Power that I couldn't understand....

For Statistical Inference,
I think I'm doing quite well...only left a few...

For Correlation and Regression Analysis,

I learnt Regression Model during Degree and Linear Model during Master but here, I feel I only covered small area of it...

For Categorical, Multivariate, Time Series and Survival Analysis
I have covered Multivariate Analysis during Master and Time Series Analysis for project.




Conclusion: I still have a long way to go...

Sunday, November 24, 2013

9. Facebook

The longest time I deactivate my Facebook before I activate it back is eight months...
Today I deactivate it again...I don't know why...
I think I spend too much time...


Let's see how long I can tahan this time before I press the "Reactivate Account"...
Well, I still have this blog and Twitter! 


...is time to spam my twitter like no tomorrow!

Saturday, November 23, 2013

8. Hobbies

I was writing my resume...
Some of the CV that I found in internet, they put Interest/Hobbies...
I don't really know what to put...I just put reading books and jogging...

But I only jogging once a month week ... does it count?

Then I realised that I don't have other hobbies except collecting stamps, reading and jogging...
I looked at my cupboard...I found my sketch book...
I looked at my garden... hmm...what an ugly garden...

OK, I decided my new hobbies will be drawing and gardening..
Let's hope I won't kill the plants...

Friday, November 22, 2013

7. My Goals

Only left one more week...
But here I'm still struggling...
After reading the hundred slides, I'm started to get headache...
I took a nap for two hours...
I started to think probably I'm not a math or stat person...
If I feel I'm suffering now, I can't even imagine what gonna happen for the future..

Only left one more month...
Then the year will end...

My goals for myself this year: 
1) Eat more fruits and sleep early.
2) Spend more time with my family and friends.
3) Have a regular excise and meditation.
4) Enjoy my life and be more adventurous.
5) Be more confident. 
My goals as a Future Mathematician and Statistician this year: 
1) Master Multivariate Analysis, Stochastic Analysis and Advanced Matrix Algebra. 2) Master the use of Matlab, SAS, R, EXCEL and SPSS.3) To finish read: 
i. The Princeton Companion To Mathematics - Timothy Gowers
ii. Reading Statistics and Research - Schuyler W. Huck
iii. Euler's Gem (The Polyhedron Formula and The Birth of Topology) -David S. Richeson
iv. Prime Obsession (Bernhard Riemann and the Greatest Unsolved Problem in Mathematics) - John Derbyshire
v. The Honors Class  (Hilbert's Problems And Their Solvers) - Benjamin H. Yandell
vi. Numerical Analysis for Statisticians - Kenneth Lange
vii.100 Statistical Tests - Gopal K Kanji

Hmm, looks like I'm going to fail to achieve my goal this year... 
Come on, Vincent. You can do it...maybe not.