BOX AND WHISKER PLOTS!!! BOX AND WHISKER PLOTS!!! @Mathematics

- anonymous

BOX AND WHISKER PLOTS!!! BOX AND WHISKER PLOTS!!! @Mathematics

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- schrodinger

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- anonymous

{1055, 1075, 1095, 1125, 1005, 975, 1125, 1100, 1145, 1025, 1075}

- anonymous

HEY...can show me how to make one for this...and to find the outliers

- Zarkon

are you using Tukey’s rule?

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## More answers

- anonymous

wat is tukeys rule..LOL

- anonymous

we are using matrices....

- Zarkon

for finding outliers

- Zarkon

matrices for a box plot?

- anonymous

dunno...wat is tukeys rule..can u teach me?

- Zarkon

find the quartiles

- anonymous

not ezactly...tas the chapter were on...technically it has nothing to do with matrices which i find funny...YES QUARTILES..FIND THOSE TOO

- Zarkon

and the interquartile range

- anonymous

YEA..THAT TOOO!! MAN U READ MY PAPER...

- Zarkon

compute
\[Q_1-1.5IQR\] and \[Q_3+1.5IQR\]

- anonymous

WAT ARE THE QUARTILES?

- Zarkon

do you know how to find the median?

- anonymous

yea...

- Zarkon

do that...that is \[Q_2\]

- anonymous

okay...then its 975...

- Zarkon

then find the median of the lower half of the data...that is \[Q_1\]
then find the median of the upper half of the data...that is \[Q_3\]

- myininaya

|dw:1319592543903:dw|
isn't this a box and whisker thingy?
also i think i'm missing an element and i keep going over the data again and again
so i don't know which one i'm missing :(
i think i;m getting old

- Zarkon

|dw:1319592983243:dw|

- anonymous

q1 is |dw:1319592990892:dw|its sumthing like tat...

- anonymous

wow..mines a fail

- Zarkon

remember you need to sort the data in order to find the median

- anonymous

oh ya...lolz

- myininaya

what i made i think is called a stem and leaf thingy ma jigger

- Zarkon

correct

- anonymous

YEA!!! STEM AND LEAF PLOT!!! lols i hated those

- myininaya

ok zarkon what element am i missing though
i have 10 elements he has 11
i have been over his set over and over and i can't figure out which one i'm missing

- anonymous

whose he?

- anonymous

who has 11 elements?

- myininaya

you have 11 elements

- anonymous

ohh....lolz im a girl...wow i got confused tare...

- myininaya

do i know how to count?

- Zarkon

not sure...but you wouldn't want to write the stem and leaf like that anyway...the stems need to be uniform...yours are not :)

- myininaya

i like my stem and leaf
:(

- Zarkon

1075

- myininaya

no i see 1075

- Zarkon

there are two of them

- myininaya

oh it occurs twice

- anonymous

ez okay myininaya..u have a very beautiful stem and leaf plot...

- Zarkon

you find the median?

- anonymous

working on it...

- myininaya

you have an odd number
so its just the middle term

- myininaya

once the set has been ordered from least to greatest

- myininaya

the set the data the whatever you want to call it

- anonymous

arghhh...i hate puting them in order...im always off a number..

- myininaya

yes like i was earlier lol

- Zarkon

do a bubble sort (or quick sort if you are in a hurry) ;)

- myininaya

if you want to use my stem and leaf you can (eventhough according to zarkon its not a legal stem and leaf) just add one more 5 for 107

- Zarkon

it is totally illegal...it should be arrested

- myininaya

what the cops don't know won't hurt them

- Zarkon

that's right

- anonymous

omg..now ur talking bout cops

- myininaya

don't worry about them
there is a separation of cops and math

- Zarkon

shouldn't you be finding the median ;)

- anonymous

i still havent gotten them in order..im always making a mistake...can u guys help?

- Zarkon

{975,1005,1025,1055,1075,1075,1095,1100,1125,1125,1145}

- anonymous

lolz..u did it sooo fast....

- anonymous

1075 is the median

- Zarkon

yes

- Zarkon

now find the median of the lower half of the data

- anonymous

1025=q1 1125=q3 rite?

- Zarkon

yes

- anonymous

YEA!!!!!!!!

- Zarkon

calculate the IQR

- anonymous

how do we do tat?

- Zarkon

\[IQR=Q_3-Q_1\]

- anonymous

100

- Zarkon

yep

- Zarkon

now compute \[Q_1-1.5\times IQR\]
and \[Q_3+1.5\times IQR\]

- Zarkon

there are called the Lower fence and Upper fence

- anonymous

102350 and 112650

- Zarkon

no

- anonymous

what did i do now....

- Zarkon

\[Q_1-1.5\times IQR=1025-1.5\times100=1025-150=875\]

- anonymous

oh....i first multiplied 1025 and 1.5

- Zarkon

what is the upper fence then ( i gave you the lower fence)

- anonymous

1275?

- Zarkon

yes

- anonymous

boo ya!!!

- Zarkon

ok..are there any numbers in your data set that are smaller than 875 or larger than 1275?

- anonymous

ummm.....no

- Zarkon

correct...therefore there are no outliers

- anonymous

yea!!! okay...now wat about the box and whiskers the pic...

- Zarkon

|dw:1319594794785:dw|

- anonymous

so tats how we draw it?

- Zarkon

sort of...hard to write on the picture

- Zarkon

the line at the bottom is a number line...the vertical lines on the box should correspond the the quartiles. the line out of the box to the left should extend out the the min value and the line out to the right of the box to the max

- anonymous

HUH????????

- Zarkon

http://ellerbruch.nmu.edu/cs255/jnord/three.gif

- anonymous

ohhhhhhh...tat explains it!! LOL

- anonymous

|dw:1319595179179:dw|

- Zarkon

nice ;)

- anonymous

yea!!! thanks for ur help!

- Zarkon

no problem

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