Exam Review Study Guide

SOLVE :

SIMPLIFY :EVALUATE :

ANSWER :

FIND :

Brackets

Exponent

Division

Multiplication

Addition

Subtraction

DIVISION and MULTIPLICATION are brothers or sisters.
ADDITION and SUBTRACTION are brothers and sisters.

If the numbers are together, it's operation is automatically MULTIPLICATION!

WATCH THIS LINK TO HELP YOU SOLVE BEDMAS!

http://www.youtube.com/v/ZOs_NjLtIHc&hl=en_

http://www.youtube.com/v/pEz_Wn35098&hl=en_

( Don't forget to follow BEDMAS ! )

a.) 6 + 2 x 4

6 + 8
=14


b.)

c.)


TOPICS :

FRACTIONS - adding, subtracting like and unlike denominators, and mixed numbers.
INTEGERS - adding, subtracting positive and negative using number lines or chips.
ALGEBRA - one step and two step problems. . . LEARN TO CHECK YOUR ANSWER!
MEASURE of CENTRAL TENDENCY - mean, median, mode, range, and outlier.

Term 3 . . . Test 1 . . . Thursday . . . June 3, 2010
SCANTRON
30 QUESTIONS
NO EXTRA TIME!

Exam Review

Translation- a translation is a slide along a straight line.

Rotation- turn around a fixed point.

Reflection- flip over a mirror line.

Mirror line can be anywhere not only the axis.

DON'T FORGET TO STUDY! EXAMS ARE IN 11 DAYS!

The Best Measure of Central Tendency

The first thing you should know about getting the best measure tendency is getting the mean, median, mode and range is the priority. But to get that first you need to rearrange the data set.

The set you need to arrange is the shirts because it is the topic. This should be arrange in smallest to biggest, so for this one its 7,7,7,8,9,9,10,11,12,50.

Then after that you should find the main things, mean, median, mode, and range.

Mean is 13

Mode is 7

Median is 9

Range is 43

In this case the median is the best measure of central tendency because its closest to everyone except for the 50.

How many shirts should the man buy for the next 30 weeks?

If 9 is the best representative I should multiply 9 to 30 like this:

9x30=270 shirts should the man buy.

Choose the Best Measure of Central Tendency

Here is a chart show how many shirts a man sold in 10 weeks.

Now what I want you to do is find the Mean, Median, Mode, and Range

The first thing I'll do is rearrange the set of data.

7,7,7,8,9,9,10,11,12,50. Mean 13 Median 9 Mode 7 Range 43

The best measure of central tendency, in this case, is the median (9) since many numbers in the set of data are close to it.

How many shirts should the man buy for the next 30 weeks?

Since nine is the best representative, I will multiply 9 by 30.

9x30=270

The man should buy 270 shirts.

Here are some things I found to help you understand measures of central tendency more:

This one I actually made,

Here is a video.

and lastly, I found this website that might also come in handy,

http://www.onlinemathlearning.com/measures-central-tendency.html

Homework Pg. 449-451 #3-16

Well thank you for reading my blog, hope you enjoyed!

Range and Outliers

Range - Positive Difference between the largest and smallest values in a data set.

eg. 6,2,9,4,3 Re-order the data set.
2,3,4,6,9 Subtract smaller value from larger value.
9 - 2 = 7. 7 is your range.
eg. -8,-1,-3,-5 Re-order the data set.
-8,-5,-3,-1 Subtract smaller value from larger value.
(-8) - (-1) = 7

Outlier - A value that is much smaller or larger than the other data values, or the "outcast".
-A data set may have one or more outliers or no outliers at all.

Try to find the Range of the following.

a). 7,4,3,6,2,5,8,3 b).11,8,8,5,7,6,7,6,6 c). -4,3,-1,0,2

Try to find the Outlier of the following.

a). 18,19,79,17,20,12 b). 14,14,16,15,1,16 c). 98,202,99,91,2,95,89,88,94

Watch this video to learn more about Range and Outlier.

http://www.youtube.com/watch?v=GnIP69AnkDQ&feature=related

Thank you for reading my post.

Please leave a comment on anything I did wrong or think I should add next time.

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

Example: -8, -1, -3, -5

-8, -5, -3, -1

(-1) - (8) = 7

The range is 7

outliers-A value that is much smaller or larger than the other data values
A data set may have one or more outliers or no outliers

* It's like,finding something that doesn't belong

Find the range of the following

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 of the following

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

The Mean

What is a Mean?

Mean- is a measurement of central tendency.
- the sum ( answer of addition) of a set of values divided by the number of values in a set or to put in a simple way, add all the numbers given and divide in how many you've add.
- AKA. Getting the average

eg. 4,5,8,99

= 4+5+8+9+9
__________
5
= 35
___
5

= 7

Try This:

A) 7,8,6,9,9,5,7,7,8,4
B) 300,250,400,300,250