## Wednesday, May 19, 2010

### Range and Outliers

Range -

The positive difference between the largest and smallest values in a data set

Eg. 6, 2, 9, 4, 3 - data set

2, 3, 4, 6, 9 - ordered from least to greatest

9 - 2 = 7

The range is 7

Eg. -8, -1, -3, -5

-8, -5, -3, -1

(-1) - (18) = 7

The range is 7

Outliers -

A value that is much smaller or larger than the other data values

A data set man have one or more outliers or no outliers

* In other words, it's just like finding something that doesn't belong

*In this case, you are looking for numbers that have a big difference between the other numbers

Find the range-

a) 7, 4, 3, 6, 2, 5, 8, 3

2, 3, 3, 4, 5, 6, 7, 8

8 - 2 = 6

The range is 6

b) 11, 8, 8, 5, 7, 6, 7, 6, 6

5, 6, 6, 6, 7, 7, 8, 8, 11

11 - 5 = 6

The range is 6

c) -4, 3, -1 , 0, 2

-4, -1, 0, 2, 3

3 - (-4) = 7

The range is 7

Find the outliers-

a) 18, 19, 79, 17, 20, 12 - 12, 17, 18, 19, 20, 79 - The range is 79

b) 14, 14, 16, 15, 1, 16 - 1, 14, 14, 15, 16, 16 - The range is 1

c) 98, 202, 99, 91, 2, 95, 89, 88, 94 - 2, 88, 89, 91, 94, 95, 98, 99, 202 - The range is 2 and 202

Page 437 - 439, # 1- 16 .... IS HOMEWORK!
*Reminder.. there is a math quiz tomorrow on Number of The Day, all 25 questions!

1. Nice post Kristel. :) I understood the process of the steps. There wasn't any mistakes, so keep up the good work Kristel. :)

2. Excellent job Kristel! Your whole post made sense and it included all the notes from class. I like how at the end of your post for the reminder you made the words big and bright. Great job Kristel!(:

3. 要保持更新呦，加油!!!期待你的新文章!!! .........................................

4. Great job Kristel! Your post was very understandable and you talked about what we learned in class. I liked the colours you used and I liked how you reminded us about the test. Keep up the good work:)

5. DUDETTE! I liked how you put the homework we had to do. You also used your colours,font, and letter size wisley.

6. Good Job!I liked the colors and I really thought it was smart of you to put the reminder:)

7. Good job Kristel! You included all the notes and even a reminder. Maybe next time you should try using more colour but everything else was excellent. (:

8. Great job, Kristel! You're explanations were easy to understand and I really enjoyed all the different colours you used to show the importance of a word. But next time try to put a link and a video.

9. Nice job! your post was nice and clear and well put. Your explanations were good and i liked the reminder for the homework, it is big and easy to read :)

10. Good Job Kristel ! I understood everything so very good job! But maybe you should show us a picture or a video next time, but either than that GOOD JOB

11. Good Job! Everything was explained very well but you could have put one picture. Other then that Good Job!

12. Good job! Everything was included that we learned, and it was easy to understand. I liked your reminder about the homework. You could have added a link or a video, but other than that, great post!

13. Good Job Kristel ! Everything was easy to understand. I liked your reminder about doing the homework. The one thing that you could of done was maybe putting a link or a vido. Anyways Excellent Job ! :]

14. Good job Kristel as always. You did a really good job at the end by making it bright. Nothing's good with an awesome ending like yours.
-Sophia
p.s. thanks for being my friend:)

15. Great job Kristel. Your post was very easy to read, yet very informative. It had colour were it was needed (titles, the reminder), and I liked that. I did find a few mistakes. The part about outliers; it said 'the range is' instead of 'the outlier is'. Other than that, great job! :)

16. good job kristel you did a good job on the colour. next time put a picture and a video.

17. great job kristale it was really good and you included all the note we took i really liked it!!!:)

18. This post was easy to read and helped me understand it. Like Meldrick I saw that mistake. Good job.

19. Good post Kristel(: I like how you added some colour and you examples on each term. Next time, try to find a video.

20. I love it, kristel! You put lots of color and I dont think you missed anything. In some places you need to put the text size bigger. Good Job!! <3<3<3

21. good post Kristel