Question

State whether each extreme in the data set is an outlier.



A.
The lower extreme is an outlier, but the upper extreme is not.

B.
The upper extreme is an outlier, but the lower extreme is not.

C.
Both extremes are outliers.

D.
Neither extreme is an outlier

http://static.k12.com/calms_media/media/1417500_1418000/1417707/1/bf04c7275efc9221a9a642622c43559107609bc6/FGA_130917_261030.jpg

Definitely not D o.o @iGreen

Answer 1

@iGreen Either A B or C

Answer 2

http://www.basic-mathematics.com/images/box-and-whisker1.gif

Answer 3

Which do you think?

Answer 4

Well, we can first find the IQR.

IQR = Q3 - Q1

IQR = 20 - 14

What's 20 - 14?

Answer 5

@iGreen 6

Answer 6

IGR = 6

Answer 7

*IQR

Answer 8

Yes.

Outliers will be points below Q1 - 1.5 * IQR

14 - 1.5 * 6

Simplify that

Answer 9

@iGreen 5?

Answer 10

Yep, so if the lower extreme is less than 5, then it is an outlier.

The lower extreme is 2, so it is an outleir.

Answer 11

*outlier

Answer 12

Outliers will also be any points above Q3 + 1.5 * IQR.

Plug in what we know:

20 + 1.5 * 6

Simplify that.

Answer 13

@iGreen 29

Answer 14

Um, no..check again.

Answer 15

129

Answer 16

Yep, so if the upper extreme is more than 129, it is an outlier, but it is not.

So the lower extreme is an outlier, but the upper extreme is not.

Answer 17

@iGreen I understand much better now :)

Answer 18

Good to know :)