median regression line (1 Viewer)

[vivien]

i got the whole divided into three part
but whats the move it to the left bit????
help???

 

[connie]

there is no move it to the left bit? it should maintain the same slope as the line connecting ml and mr and then be a third of the way between that line and mm?

 

[Agnes2810]

i came across this today. what the HELL is the median regression line.

i think i missed it.

lol hopefully it wont be on the test :S

 

[connie]

looking at past papers it is quite a common question, i suggest you learn it.

perhaps u did learn it but it was referred to by a different name, i.e the line of best fit?

 

[Agnes2810]

no i went up 2 skool today and got it sorted out. its not the same as line of best fit

but with graphics calculators its ok coz we get the equation and where the line goes

 

[connie]

*deleted*

 

[Agnes2810]

Originally posted by connie
you aren't allowed to take a graphics calculator into the hsc?! and yes it can be referred to as the line of best fit

yeah you are! wat planet u from! lol of course ur allowed

 

[mushi]

i just wanna clear something up ..

is the median regression line, the line u join the 1st/last point to or is it the dotted line to which you slide to the middle median point?

 

[connie]

*deleted*

 

[Agnes2810]

Originally posted by connie
what planet are you from, i've been doing the course for a alot shorter period of time then you and atleast i know all the work, i would prefer to know my work than to know what type of calculator was required. i don't appreciate insinuations that i'm from a different planet, when i'm the one who made a "human error"

geeezus!! i was joking! maybe next time you should check b4 saying something untrue.

 

[Agnes2810]

and soReeeeeee if i was asking ppls for help, and since ur a miss know it all SOREEEEE

 

[connie]

well geezus!!! i was joking! maybe i didn't check because i didn't know it was untrue, had i known it was untrue i would have checked but if i knew it was untrue why would i check seeing as new? so you see i did something called "making a mistake" but i guess some people in this world (or out of it) don't make mistakes

and really theres no need for apologies

 

[connie]

*knew

 

[mushi]

can someone answer my question plz?

 

[Agnes2810]

Originally posted by mushi
is the median regression line, the line u join the 1st/last point to or is it the dotted line to which you slide to the middle median point?

the median regression line.. to MY understanding, wat u do is divide the scatterplot into 3 equalish areas, and through finding the median of each group, plot a dot where the middle is and do that for each area, and then join it up.

it is NOT the same as the line of best fit, as the line of best fit is drawn by eye, and median regression line is actually calculated...

does that make sense..

Originally posted by connie
well geezus!!! i was joking! maybe i didn't check because i didn't know it was untrue, had i known it was untrue i would have checked but if i knew it was untrue why would i check seeing as new? so you see i did something called "making a mistake" but i guess some people in this world (or out of it) don't make mistakes

god get over it!

 

[connie]

Originally posted by Agnes2810
g i'm silly

over it

 

[mushi]

hehe..well kinda..

what im trying to say is, theres 2 lines right? the dotted one and a stright one.

THe stright one is made by joing up the 1st/3rd median and the dotted line is the sliding line.

but im trying to say is, which one is the actual regression line?

 

[Agnes2810]

Originally posted by mushi
hehe..well kinda..

what im trying to say is, theres 2 lines right? the dotted one and a stright one.

what dotted one????? theres one line!!

 

[mushi]

nah, pretty sures there 2

anyway, i just found my answer in a textbook, stupid me

thx anyway !