Measures of Central Tendency: Outlier

Outlier- a value that is much larger or smaller then the other data value
           - the set may have more then 1 outleir or 0 outlier
          Outlier of 1, 67, 68, 65, 100 are 1 and 100

Measures of Central Tendency: Range

Range- the positive difference between the largest and smallest values in a data set
          Range of 4, 8, 5, 6, 9, 1, 3, 5, 8, 6 is 8
1, 3, 4, 5, 5, 6, 6, 8, 8, 9 
9-1=8
         Range of 7, 8, 4, 3, 9, 4, 6, 13, 17, 4, 12 is 14
3, 4, 4, 4, 6, 7, 8, 12, 17
17-3=14

Measures of Central Tendency: Mean

Mean- a measure of central tendency
        - the sum of a set of values divided by the number of values in the set
Mean of 6, 4, 8 is 6
Add up all the numbers and divide the result by how many numbers there are
6+4+8=18
13÷3=6
There for the mean is 6
Mean of 3, 4, 2, 1, 5, 3 is 3
3+4+2+1+5+3=18
18÷6=3

Measures of Central Tendency: Mode

Mode- the most frequently occurring number in a set of data
Mode and Most both have four letters
Mode of 3, 5, 7, 7, 9 is 7
Mode of 2, 2, 4, 6, 6, 8, 71 is 2 and six
Mode of 1, 2, 3, 5 is no mode
Mode of 1, 1, 1, 2, 2, 2, 3, 3, 3 is no mode
Mode of 1, 1, 1, 2, 2, 2, 3, 3, 3, 4 is 1, 2 , and 3

Measures of Central Tendency: Median

Median- the middle number in a set of data after the data have been arranged
eg. Median of 2, 5, 6, 8, 9 is 6
     Median of 1, 3, 6, 8, 9, 10 is 7
     Median of 6, 9, 13, 7, 8, 11 is 8 1/2

Measures of Central Tendency

- a value that represents the center of a data set can be the mean, median, or mode
- data set is a group of numbers that you must arrange in order from least to greatest
2, 3, 4, 5, 6, 5, 4, 5, 3, 4, 5, 6, 7, 5, 34, 3
2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 7, 34

Expression

Any single number or variable, or combination of operations involving numbers and variables.

( -, + , x, ÷ )

eg. 5, n, 8t, x+1, 2y -7

Homework Booklet

Chapter 7.1 Question 5

Look at the diagrams to determine a common denominator and

equivalent fractions for this pair of fractions.

Common denominator: 20

Equivalent fractions:

4/5= 16/20 and 1/4= 5/20

Numerical Coefficient

A number that multiples the variable.

Variable

A letter that represents an unknown number.

eg. x, a, n

Multiples

The product of any given number and natural number like 1,2,3...

eg. Some multiples of 3 are: 3,6,9,12,15,18...

list the 1st 5 multiples of each number.

2-2,4,6,8,10

3- 3,6,9,12,15

4- 4,8,12,16,20

5-5,10,15,20,25

8-8,16,24,32,40

12- 12,24,36,48,60

Multiples are just like multiplying.

How to do number 16 and 17 on Number of the day

Number 17- make a two digit number using the digit in ones place

first and the tens place second.

eg. 43 from December 7

Number: 9834.765

Then find from the prime factors

43-1, 43

so 43 is the only prime factor

1 is not prime.

Number 16- Only look at the whole number

Then go through the divisibility rules.

Denominator and Numarator

Denominator- the bottom number of a fraction

and tells us how many equal parts the whole is divided into.

eg.

Numerator- is the top number of a fraction and tells us how many parts

of the whole we have are dealing with.

eg.

Subtracting Fraction with like Denominator

2/3-1/3=1/3

3/4-1/4=2/4 or 1/2

Math Textbook

Q.9 Pg.138

Order of Operations

4x3+4÷ 2

12+12÷2

12+6

18

First Multiply 4x3=12

Second Divide 12÷2=6

Third Add 12+6=18

Last Square the answer

Link

http://www.youtube.com/watch?v=ZOs_NjLtIHc