Question

Find the interquartile range of the data.



A.
49

B.
35

C.
16

D.
14
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Answer 1

^_^ im on it

Answer 2

Do you know how to read the stem and leaf plot?

Answer 3

Yes

Answer 4

Can you find the median of the dataset?

Answer 5

The median is the middle number of the sorted list. If there are nine values, the median is the fifth number.

Answer 6

Is it 44.5?

Answer 7

For example, the median of {1,3,6,8,9} is 6.
The median of {1,5,7,10} is 6, because the "middle number" is between 5 and 7.

Answer 8

Correct! Very well
Can you now find the first quartile, and third quartile?

Answer 9

actually the median would be 40.5

Answer 10

wouldnt it?

Answer 11

(43+46)/2 = 44.5

Answer 12

The first quartile is the median of the lower half of the data.

Answer 13

ok, i was doing it wrong haha, thanks mathmate :P

Answer 14

Ok, that's the part I'm having trouble in.
I dunno how to find the Q1 or Q3 in a stem and leaf plot

Answer 15

@死は最高です no problem, it's hard to write your screen name.

Answer 16

The smaller half of the data is the set of numbers below the median, namely {31,33,35,41,43}.
The 1st quartile (Q1) is the median of this set of data. Can you find that?

Answer 17

wouldnt the lower quartile be 37.75?

Answer 18

35

Answer 19

35 is correct!
Can you now find Q3?

Answer 20

nope, i guess im all over the place today :P nvm, my mind is way too tired

Answer 21

@死は最高です that's ok. As long as @Music_me is working on it.

Answer 22

Btw, @死は最高です what does your screen name translate to in English?

Answer 23

haha, yah i need sleep, its like 8:34pm, and i haven't had sleep since two days ago, sorry @Music_me

Answer 24

Would the Q3 be 49?

Answer 25

Exactly!

Answer 26

Do you know how to calculate the interquartile range?

Answer 27

Yes

Answer 28

@Music_me what would you propose for IQR?

Answer 29

14

Answer 30

it translates from japanese to english as "Death is the Best" (as a Direct translation) however, it is technically saying something similar to "In death is rest, peace, and bliss"

Answer 31

Exactly! Well done! :)

Answer 32

Thnx :)

Answer 33

To sum up, Q1 is the median of data below the median, and Q3 is the median above the median (median is actually Q2).

Answer 34

@music_me You're welcome! :)

Answer 35

sorry, my english translation abilities especially when it comes to ancient quotes, is difficult :P

Answer 36

so i cant really say what it is exactly in english

Answer 37

@死は最高です that's ok. Thanks anyway!

Answer 38

yah, im sorry i couldn't help this time @Music_me I'm a little too tired -_- ill get some sleep, and ttyl. maybe when I'm a bit more rested, I'll be of more help. T_T

Answer 39

It's ok

Answer 40

kk, ttyl

Answer 41

ttyl