Zeeshan's Measures of Central Tendency

5:12 PM

(8) Comments

Mean




  • Put raw data in ascending order

  • Sum of all data/overall outcome

  • If you have a outlier it can change the mean


Example



1,1,4,6,9,12=33



Median




  • Put raw data into ascending order

  • Find the middle number

  • If there is 2 numbers left add and divide by 2

  • If there is an outlier, median is the best way to find the average



Example


Mode

  • Put raw data in ascending order
  • Most common data
  • You can have more than 1 mode
  • You can have no mode at all

Example

1,1,3,6,8,12

1 is the mode

Range

  • put raw data into ascending order
  • the largest data minus the smallest data


Example

1 , 1 , 6 , 9 ,12

1-12=11 is range

Zeeshan873

Scribe Post For Nov.6 2008

4:56 PM

(8) Comments

Today In class we first had a Quiz on adding and subtracting integers pretty much everything we learned not including multiplying integers. Here was one of the questions on the quiz

(-9-3) - (-21) =

This is how i answered it

(-9-3)-(-21)=

(-12) - (-21)=

But then theres an "uh oh"

(-12) + (+21)= 9

Then We went over the stuff we did yesterday.

(+6)(+2)

Then we figured out this sentence.

" When you multiply a positive integer and a positive integer the product is positive."

After that we went on to the next part, * remember the parts go counterclockwise.

We started with this question






Then For homework we had to write our own question here's mine.



Then We Moved on the the 3rd part We started with this question.





Here is the example how its done with Integer Tiles.





** The arrows mean take away ****


Then We had to make a question for homework here's mine.



The last section

(+3)(-2)=



Then we had to do a question for home work here's mine




For the next scribe i pick Simran. Thanks and Please leave a comment.

shaneille 9-05

Scribe Post for November 5, 2008

4:25 PM

(8) Comments

Today in class, we talked about multiplying integers. We were recorded by the smart board. Mr. Harbeck and Mr. Baché gave us 2 pieces of paper. One was blue and the other one was white. (we only used the blue paper for today.) We had to fold it and make it into eight squares. We opened it up and only kept the 2 flaps folded in. We cut on the middle of the paper so there
would be 4 doors, 2 at the top and 2 at the bottom. At the end, it should look like this:

















On the first flap (++) we opened it and wrote:

(+2)(+3)

When brackets are touching we multiply

Make two groups of 3.














For homework in our (++) Multiplying Integers Sheet (blue) we had to make up a question draw a picture here is what I did:


(+3)(+5)

For next scribe I choose Shaneille. So I guess I am done now. Thanks for reading my scribe post. Please leave a comment!

Zerlina905

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Scribe Post for November 4, 2008

5:33 PM

(5) Comments

Today in class, we went over questions from yesterday's homework, that people had difficulties with. For example, one of those questions were Question #10, in Part Three. People found this question difficult, because there is a subtraction sign by itself in the beginning of the question.

But before I explain how to solve Question #10, I'll go over the steps on how to solve questions that have more than one integer in the brackets.


Okay, now I'll explain how to do Question #10, in Part Three.

After Mr. Harbeck went through all those questions, he taught us how to solve questions that have discountonall square brackets. Those brackets look like these --> [ ]

When solving these kinds of questions, the steps are a little different, compared to the steps on how to solve questions with more than one integer in the brackets.

1. solve inside the round brackets

2. solve inside the square brackets

*when you've finished solving inside the square brackets, you should be left with only one integer*

3. rewrite the question
  • keep the brackets
  • pull down all the order of operation signs

4. get rid of the "uh-oh's" by changing it into an addition sign

5. rewrite the question in standard form

6. solve

These are two examples of questions that have square brackets.

Example #1 -


Example #2 -


For homework, we need to finish Part Four, and Page 12 (AKA last page). Also, you need to pick any 10 questions from Pg. 12, and in your scribbler, rewrite them in standard form.
That's about everything we did in class today.
For tomorrow's scribe, I pick Zerlina.
Thanks for reading my scribe, and please leave a comment (:

melanie905

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Scribe List

9:34 PM

(0) Comments

Here is the Scribe List for 873. Please select a classmate who is responsible to be the scribe from this list. Be sure to ask a person who has not been chosen yet in the current scribe round.

Scribe List
Zerlina November 5 January 20
Justin A January 7
Francis December 15
Azra January 23
Elmane November 14
Shaneille November 6
Myles
Angela November 12 January 23
Melanie November 4 January 22
Aaron
Aleiah November 3 January 19
Christian November 25
Kareel January 12
Any November 18
Lance November 19
Shannon
Kara December 1 January 21
Gerico January 8
Monique
Kristin November 13
Brendan January 6
Justin P December 12
Andrew December 9
Leomar December 11
Carlos December 17
Simran November 10
Vikram January 12
Alwin December 16
Darren January 13
Chie November 19
Sebastian January 13
Bea December 2
Louise November 26
Shaine January 5

Mr. H

Scribe Post for November 3 2008

5:13 PM

(6) Comments

Today we had to do a few problems from the green booklet. We have to do questions that are similar to the questions from Part 3 (which coincidentally is our homework).

The difference in these questions are that you'll need to do BEDMAS.

For example, if you take question... I don't know... 13.

13. (17-25) - (-8+7) - (-15+25)


First Step: Do the INSIDE of the brackets.



13. (17-25) - (-8+7) - (-15+25)
-8 -1 10

Second Step:Keep the brackets

13. (17-25) - (-8+7) - (-15+25)
(-8) (-1) (10)

Third Step: Pull down order of operations sign

13. (17-25) - (-8+7) - (-15+25)
(-8) - (-1) - (10)

Fourth Step: Look for "uh-oh"s (and turn them into have have)

13. (17-25) - (-8+7) - (-15+25)
(-8) + (+1) - (10)

Fifth Step: Rewrite (and look for shortcuts like zero pairs because we're "lazy teenagers")

13. (17-25) - (-8+7) - (-15+25)
(-8) + (+1) - (10)
-8+1-10



Sixth Step: Combine like integers

13. (17-25) - (-8+7) - (-15+25)
(-8) + (+1) - (10)
-8+1-10
-18+1 =+17


10. -(-2+8) + (-3-4)








3. (-2+4) - (-4+2)=

( 2 ) - ( -2 )

(2) + (+2)

2+2=4

Homework

1. Part 2. odd numbers only (if you haven't done them already)

2. Part 3. All of it.

I pick Melanie to do the next scribe.

allie

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scribe post for october 30th, by Azra

11:55 AM

(3) Comments

we learn in math class about integers. Positive and about negative integers. First we learn how to add integers, here some example for positive integer, first we have to know something
(+) + (-) = (-)
(-) + (-) = (+)
(+) + (+) = (+)

some example for positive integers



(+3) + (+9) = (+12)



(+5) + (+5) = (+10)



(+2) +( 4) = (+6)



(+4) + (+9) =(+13)



and then we do more positive integer



earn 30 doller lose 5 doller = left (+25) or 25 doller



have 5 orange lost 2 orange = left 3 orange






then we lern about how to draw integers time line I will show you time line pictures after first I want to show you how can we subtract integers, some example are



(-5) - (-9)



=(-5) + (+9) = (+4)



(-8) - (+6)



=(-8) + (-6) = (-14)



(-2) - (0)



= (-2)



Now I want talk about 0 pairs, some example for 0 pairs



(-6) + (+6) = (0)



(+100) + ( -100) = (0)



(+1000) + (-1000)= (0)



we did stenderd form in integers like



-2 -9 =-11



=+6 -7 = -1






-6 +2 - (-2)+ 3



=-6 +2 + (+2) +3



=-6 +7



=+1






we had quiz about negative and positive integers, like



(+9) + (+6) = (+15)



(+2) + (0) - (-4)



(+2) + (0) + (+4)



(+6)






(-5) - (-5)



= (-5) + (+5)



= (0)






(+6) + (+9) - (-4) - (-8)



=(+6) + (+9) + (+4) + (+8)



=(+27)


more about integers



rises 3 degree drop 2 degree = left 1degree



have 50 books give a friend 10 books = left 40 books




now I want to talk about time line, how can we add integers in time line



(+2) + (+1) = (+3) in time line













azra873

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