Ahhhhh Maths Hw

R0BD0G · 21-02-2007, 08:43 PM

hey people.....difference between range and interquartile range?????

6,9,12,13,20,22,26,29???

Fairlane · 21-02-2007, 08:49 PM

http://en.wikipedia.org/wiki/Interquartile_range

try that.

Man i wish i had wiki when i was suffering through Year 12 Maths

Ford_V8 · 21-02-2007, 08:52 PM

lol I feel your pain, just started VCE math methods this year and there is nothing worse than hours upon hours of maths homework. Anyway we did range and IQR a couple of years ago but I think range is the absolute range, like lowest value to highest value. And iqr is Q3-Q1

:

R0BD0G · 21-02-2007, 08:53 PM

funny....not yr 12 math....year 10

R0BD0G · 21-02-2007, 08:53 PM

thanx ford v8....that helps

Psycho Chicken · 21-02-2007, 08:58 PM

Why the hell did I do methods? I never had a chance.

lavenlaar · 21-02-2007, 09:06 PM

Now my theory of today's school work is in what damn job is that going to be a major factor ?
Systems Analyst ?

pertuan · 21-02-2007, 09:06 PM

I've never heard of Interquartile Range... :S And I did Engineering at Uni. Should I be worried? :P

Fairlane · 21-02-2007, 09:12 PM

Quote:

Originally Posted by pertuan

I've never heard of Interquartile Range... :S And I did Engineering at Uni. Should I be worried? :P

I wouldnt be too worried, im at Uni (not engineering) and ive forgotten 99% of the stuff i did in Maths and Physics, stuff that i was actually pretty good at.

HLC · 21-02-2007, 10:18 PM

Quote:

Originally Posted by Fairlane

I wouldnt be too worried, im at Uni (not engineering) and ive forgotten 99% of the stuff i did in Maths and Physics, stuff that i was actually pretty good at.

im at uni, and i forget stuff i did last semester/year, let alone first year, or school even LOL

Dezza · 21-02-2007, 10:49 PM

Quote:

Originally Posted by pertuan

I've never heard of Interquartile Range... :S And I did Engineering at Uni. Should I be worried? :P

I learnt it back in about year 10! The range is the difference between the smallest number and the highest. The interquartile range is found by arranging the numbers in order from smallest to biggest, then subtracting the value at the 1/4 mark from the value at the 3/4 mark. I'm also a uni student, studying engineering but I'm deferring for a year

sgt_doofey · 21-02-2007, 11:18 PM

Quote:

Originally Posted by lavenlaar

Now my theory of today's school work is in what damn job is that going to be a major factor ?
Systems Analyst ?

Nah,
As an Analyst, you get people to tell you the formulas. It's not us to us to know what they are.

TuMor · 22-02-2007, 02:57 PM

Quote:

Originally Posted by Kermit 73

hey people.....difference between range and interquartile range?????

6,9,12,13,20,22,26,29???

Wouldnt interquartile range be the diff between the middle or average of the lot, and start/end num? Range being diff from lowest to highest number?

......whoops been answered few posts b4.

uranium_death · 22-02-2007, 03:27 PM

Quote:

Originally Posted by Kermit 73

hey people.....difference between range and interquartile range?????

6,9,12,13,20,22,26,29???

1st Quartile = (9+12)/2 = 21/2= 10.5
Median = (13+20)/2 = 33/2 = 16.5
3rd Quartile = (22+26)/2 = 48/2 = 24

Interquartile Range (IQR)= 3rd Quartile - 1st Quartile = 24 = 10.5 = 13.5

I think that's right...I haven't done that stuff for 5 years.

**Polyal** · 22-02-2007, 03:32 PM

Yeah what UD said seems right, although im not going to bother with trying to work it out. God I thought I was lazy, wheres your text book!

I remember using my fingers to get figures with those questions, finding the median and all that.

Also, if you can, get a program called PaceXL. Its an add on for excel and it is BRILLIANT. I used it for Business Analysis (cant remember the name of the unit..LOL). Does charts, graphs, everything really.

uranium_death · 22-02-2007, 03:54 PM

Quote:

Originally Posted by Kermit 73

hey people.....difference between range and interquartile range?????

6,9,12,13,20,22,26,29???

The Interquartile range is the difference between the 1st Quartile and the 3rd Quartile. You know how to work out quartiles?

The median is the middle value.

E.g.

6,9,12,13,20,22,26,29

In this case, there is no middle number, but it would fit in between 13 and 20. Just find the average there, which is 16.5. So the median is 16.5.

For quartiles, there are 8 numbers. The 1st Quartile would be after 2 numbers. This is b/t 9 and 12 = 10.5. 3rd is after 6 numbers = b/t 22 and 26 = 24

The RANGE is simply the lowest value to the highest value. In your case, 29-6 = 23. 23 is the range.

The range will almost always be higher than the Interquartile Range, simply because the IQR only contains 50% of the values listed. The range contains all values.

uranium_death · 22-02-2007, 03:54 PM

I love maths. I'm not great at it, but I love maths.

**thefargo** · 22-02-2007, 06:15 PM

I teach this stuff, and uranium death is correct on two counts.
1. the love of maths
2. the answers provided

I would give you full marks u/d

xbcool · 22-02-2007, 07:00 PM

just like algebra ,it will come in handy in the real world.(not)

TEKILA · 22-02-2007, 07:03 PM

just ask B.O.B - back of book...........(answers) hehe :thebirds:

Ford_V8 · 22-02-2007, 07:48 PM

Haha good ol b.o.b. What a laugh, I actually remember lecturing my teacher on how we would never use this (or something similar) throughout the course of our entire lives. And here we are being told by engineers that they don't even know what it is :hihi:

Ryan · 22-02-2007, 07:52 PM

Quote:

Originally Posted by xbcool

just like algebra ,it will come in handy in the real world.(not)

Not wrong there.

I'm doing year 12 maths at Tafe, and the Algebra is pointless and quite hard.

Seriously where the hell would you use....

xy+ab= b????

Then you get fractions, cubed, squared, square root etc thrown in.

I can do it, but it's bloody hard and I don't see the point.

R0BD0G · 22-02-2007, 10:08 PM

THANK YOU EVERYONE FOR YOUR HELP!!!!!!

much appreciated and if i ever have anymore trouble i'll just put it up again......

and everyone in my math class agrees with just about everyone......"where the hell do you use this in the real world".....

thank u all again

Robbo

**thefargo** · 22-02-2007, 10:33 PM

you don't use it in the real world.
but it trains your mind to work a certain way. words like logical, reasoned and analytical jump in here.
people sometimes ask me "what made you think about it that way?"
I usually say, a background in algebra. that is when they hit me!

xbcool · 23-02-2007, 05:57 AM

Quote:

Originally Posted by Ryan

Not wrong there.

I'm doing year 12 maths at Tafe, and the Algebra is pointless and quite hard.

Seriously where the hell would you use....

xy+ab= b????

Then you get fractions, cubed, squared, square root etc thrown in.

I can do it, but it's bloody hard and I don't see the point.

xb+clevo+393= fun :sm_headba
I think this is correct I may have the decimal point in the wrong spot

:

sorry THEFARGO

steve

Wally · 23-02-2007, 09:01 AM

Quote:

Originally Posted by Ryan

Not wrong there.

I'm doing year 12 maths at Tafe, and the Algebra is pointless and quite hard.

Seriously where the hell would you use....

xy+ab= b????

Then you get fractions, cubed, squared, square root etc thrown in.

I can do it, but it's bloody hard and I don't see the point.

You need to apply that alegbra to some real world things; e.g car engines. It's not pointless.

R0BD0G · 23-02-2007, 04:50 PM

Quote:

Originally Posted by xbcool

xb+clevo+393= fun :sm_headba
I think this is correct I may have the decimal point in the wrong spot

:

sorry THEFARGO

steve

thats the spirit......im so over maths......but i get out of it on monday.....

for all the wrong reasons

Gimmers55 · 23-02-2007, 07:59 PM

Quote:

Originally Posted by Kermit 73

hey people.....difference between range and interquartile range?????

6,9,12,13,20,22,26,29???

Range is the difference between the highest and lowest score while
IQR is defined as the range of scores that make up the middle 50% of a distribution; that is the scores lying between the 25th and 75th percentile:

6, 9, (Q1=10.5), 12, 13, (Q2=Median=16.5), 20, 22, (Q3=24), 26, 29.

Range = 29 - 6 = 23
IQR = 24 - 10.5 = 13.5

XRchic · 23-02-2007, 10:53 PM

I would have thought there were quite a lot of jobs where high levels of maths were used - maybe not every day jobs, but used nonetheless...

My Dad is an engineer specialising in many fields, and uses A LOT of maths.

Any profession which has an analytical component and which uses statistics. Even psychologists use stats heaps. It is probably not what I would call advanced maths though.

Economists use maths a fair bit for their calculations.

Many of the sciences rely on maths: physics, chem, astrophysics....

I would have thought a pilot/navigator would need a lot of maths skills.

Same with computer/IT type jobs.

LOL I even use algebra working in tax law!

And the best thing is that some of my vague recollections from year 12 and uni maths MAY help my kids, who are about to start high school. I may be able to help them pass their exams when it counts, as they want to do vet science and aerospace engineering respectively!

One Drone · 24-02-2007, 01:34 PM

Someone needs a mathemagic computer tutor! lol