happy last few days of 2009

Dear students,

dear dear students... today's the 2nd last day of 2009.
i'm looking forward to the new year: another hardworking year of maths and more maths.
Yes, i know we've already worked hard this year.
But i'm certain that next year will be better... more things to do, but more fun to have too !!

i hope we'll continue to relate well with one another, so that we can maximise joy and laughter.
The sweat, i can't cut down, cos i don't control the weather !
As for the tears, i'm hope to minimise the occasions for it... unless they are tears of joy...
But if we do cry, then i'll lend you my shoulder and give you tissue.


Before i start planning how to "torture" you, i wish you very Merry Holidays and a Happy New Year !
:)

the mrbrown show: 20 litres only

the mrbrown show: 20 litres only

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Something lame and funny. Come on, you're a smart student... can u figure out a logical way to tell whether the petrol tank contains more than 20 litres of M'sian petrol ?

Of course you can. Otherwise, why study chemistry and maths ?!

Standard Deviation (grp Data) Prac Qn 3

Here's the solution for Standard Deviation (Grped Data) Prac Qn 3.

Notice that the histograms show evidence that grp B scores gather mostly around 50-90, whereas Grp A spread from 10 all the way to 100. This is a clear example of how standard deviation DOESN'T do its job as a measure of consistency.

In Statistics, which is a big branch of Maths, you'll find that you ought to use different measures to calculate and compare. It all depends on what kind of data has been gathered. It's a very big subject area. You'll know more when you enter JC, or if you take up Stats module in Poly Maths or Uni Maths... or, if you just surf the internet !

:)