Question

What is the interquartile range of the data?

100, 120, 130, 188, 196, 220, 265, 300

A.
200

B.
117.5

C.
242.5

D.
145

https://www.mathsisfun.com/data/images/interquartile-range.gif

Answer 1

look at this
https://www.mathsisfun.com/data/images/interquartile-range.gif

Answer 2

Will first you need to find Q1 Q2 and Q3

Answer 3

And when you do these you have to find Q2 first, how do you do that?

Answer 4

The three quartiles Q1, Q2, and Q3 divide the data into four “equal” parts. About 25% of the data falls at or below Q1, 50% of the data falls at or below Q2, and 75% falls at or below Q3. To find the quartiles: 1.
Section 2.5, Measures of Position

Answer 5

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwiszY2htNjLAhWGMSYKHYWzDrkQFggfMAE&url=http%3A%2F%2Fwww.math.utah.edu%2F~anna%2FSum12%2FLessonPlans%2FSection25.pdf&usg=AFQjCNFQvbj_NFeXw3HymDZYmp1VwbbFfw

Answer 6

I know how I'm asking you :)

Answer 7

yes

Answer 8

Okay so what do you get for your Q2

Answer 9

130 and 188

Answer 10

hmmmmm?

Answer 11

Q2 is the median number

Answer 12

192

Answer 13

Good now you have to split this up into two sections for the Q1 and Q3

Answer 14

how

Answer 15

So start on the left side the smallest number though188

Answer 16

Find the median on those numbers

Answer 17

100,120,130 and 188

Answer 18

120 and 130 so i need to add both and / by 2 right

Answer 19

Yes

Answer 20

125

Answer 21

Yes so that is your Q1

Answer 22

Now you need to do the right side from 188 to the highest number so your splitting these numbers up by where the median is

Answer 23

188,196,220,265 and 300 right

Answer 24

its 220

Answer 25

My bad it's 196

Answer 26

Where you need to start, the right of the median

Answer 27

196

Answer 28

Yes so you need to start there and go to the highest number than find the median there

Answer 29

so i got 220 and 265 so add both and / by 2 right

Answer 30

Yes

Answer 31

242.5

Answer 32

its c right

Answer 33

Yes that is your Q3 now inner quartile range says subtract the 3rd inner quartile by the 1st inner quartile so Q3-Q1

Answer 34

No

Answer 35

its b

Answer 36

Yes :)

Answer 37

thank kayders1997

Answer 38

You're welcome :) JohnNewman

Answer 39

i have medal you

Answer 40

Thanks :)

Answer 41

And I have medaled you for your effort