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what is the best way to divide a bunch of people into groups to assure that the groups are 'random'?? Question from my 2nd year stat exam

alright, you have 2 pieces of rope, you know that each rope takes an hour to burn they are not at all uniform (ie. can be fat at one end and skinny at another) that is, burning a rope 1/4 of its length does not take 15 minutes how would you measure 45 minutes exactly??

Let a=b multiply both sides by b ab = b^2 minus a^2 from both sides ab-a^2 = b^2 - a^2 factorise a(b-a) = (b-a)(b+a) divide both sides by (b-a) a= b+a BUT a=b a = 2a divide through by a 1 = 2

What were everyones marks in the hsc?

How did everyone go. I got :- Examination Mark- 82/100 Assessment Mark- 82/100 HSC Mark- 82 Band- 5

i had to do C programming at Uni this session and i have to say programming is so stoopid/hard/boring does anyone hear actually like programming or is good at it?

woops

total What do you reckon your total mark will be MDP plus exam?

I was just wondering why Design and Technology students like us have to work our asses off all year making major design projects while still trying to study, why this subject is so poorly ranked.?

Has everyone's major design project been marked yet. When and how can we find out if our MDP has made it to the Power house Museum exibition.

Dat was easy nothing that caused me any problems how bout you

Hey can anyone tell me what the impact of the GST was on the Australian economy? relating it to the aggregate demand- aggregate supply model??! thanx

i am possessed. seriously i am that damn good at any computer game. it started at an early age when i finished alex the kidd on sega when i was about 4, from then on ive always been a computer game master. i wish they had a big competition or something, or there was a way to get payed for...

just wonderin, there are plenty of high marks worthy enough

A small amount of pure sodium metal is dropped into 1.2L of water. The reaction is summarised in the following equation. 2 Na(s) +2 H2O(l) ---> 2 NaOH(aq) + H2(g) The gas collected occupied a volume of 4.68L at 25 degrees celcius and 1 atm. pressure a) Calculate the amount in moles of...

Q. A student placed a 0.5g strip of magnesium ribbon in 100mL of (i) 0.10 mol/L ethanoic acid (ii) 0.10 mol/L sulfuric acid Compare the chemistry of the above two reactions in terms of the strength of the acid, rate of reaction and volume of gas formed. Use equations in your answer ???

1)explain why the hydrogen spectrum contains many lines when a hydrogen atom only contains one electron? 2) The ground state potential of the hyrogen atom is -13.6 eV. A photon of energy 14.6 eV collides with an elecron in the ground state of a hydrogen atom. What will be the energy of the...

do we have to know all the types of quarks and leptons, their symbols and their charges?? Also in this years Newington trial there was this question in quanta to quarks and i'm not sure how its done.. Q.An electric field is applied to a sample of hydrogen to stimulate the Balmer transition...

from a pack of nine cards numbered 1,2,3,......,9 , three cards are drawn at random and laid on a table from left to right 1) what is the probability that the number formed exceeds 400? 11) what is the probability that the digits are drawn in descending order??

1) How many different six letter words can be formed from the letters of the word AUSTRALIA ?? 2) How many different sums of money can be made up from six $20 notes, two $5 notes, four $2 coins, seven $1 coins, three 50c coins, and one 20c coin ??