Measures Of Central Tendancy + Number Set
Data Set
Values that provide information on given contexts
Natural Numbers
1
Any number divided by 1 equals itself.
GCF
Greatest Common Factor
45: 1, 3, [5], 9, 15, 45
50: 1, 2, [5], 10, 25, 50
5 is the GCF
Mean
Central value in a data set. Also known as the average
Sum of Values รท by Amount of Values
Integers (Z)
All whole numbers are their "counterparts"
*0 does not have a counterpart
5
Any number that ends in 5 or 0
9
The digits add to 9
LCM
Lowest Common Factor
5: 5, 10, 15, 20, 15, 30, 35, 40, [45], 50
9: 9, 18, 27, 46, [45], 54
45 is the LCM
Median
The middle value in a set when the numbers are arranged from least to greatest
Rational Numbers (Q)
Any number that can be written as a fraction or ratio
*N, W, and Z, are included in this set as they can be written as fractions
2
The last digit is even/The number is even.
3
The sum of all the digits is divisible by 3.
Factor Tree
A method of finding the prime factors for any number
Mode
The number that occurs the most often. You can have more than one mode or no mode.
Irrational Numbers
A number that can not be expressed as a simple fraction as it has an infinite amount of non-repeating decimals.
*unpredictable
i.e pi, root of 2, root of 3,
Any number that is divisible by 2 AND 3.
4
The last 2 digits are divisible 4
Whole Numbers (W)
Real numbers (R)
All numbers that exist on the number line
8
The last 3 Digits are divisible by 8