Definition Mean Mean – the average of a group of numbers. 2, 5, 2, 1, 5 Mean = 3.

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Presentation transcript:

Definition Mean Mean – the average of a group of numbers. 2, 5, 2, 1, 5 Mean = 3

Mean is found by evening out the numbers 2, 5, 2, 1, 5

Mean is found by evening out the numbers 2, 5, 2, 1, 5

Mean is found by evening out the numbers 2, 5, 2, 1, 5 mean = 3

How to Find the Mean of a Group of Numbers Step 1 – Add all the numbers. 8, 10, 12, 18, 22, = 96

How to Find the Mean of a Group of Numbers Step 2 – Divide the sum by the amount of numbers. 8, 10, 12, 18, 22, = 96

How to Find the Mean of a Group of Numbers Step 2 – Divide the sum by the number by the amount of numbers. 6)6)

How to Find the Mean of a Group of Numbers The mean or average of these numbers is 16. 8, 10, 12, 18, 22, 26

What is the mean of these numbers? 2, 9, 14, 27 13

What is the mean of these numbers? 26, 33, 41, 52 38

Definition Median is in the Middle

Definition Median Median – the middle number in a set of ordered numbers. 1, 3, 7, 10, 13 Median = 7

How to Find the Median in a Group of Numbers Step 1 – Arrange the numbers in order from least to greatest. 21, 18, 24, 19, 27 18, 19, 21, 24, 27

How to Find the Median in a Group of Numbers Step 2 – Find the middle number. 21, 18, 24, 19, 27 18, 19, 21, 24, 27

How to Find the Median in a Group of Numbers Step 3 – If there are two middle numbers, find the mean of these two numbers. 18, 19, 21, 25, 27, 28

How to Find the Median in a Group of Numbers Step 3 – If there are two middle numbers, find the mean of these two numbers = 46 2)2) 23 median

What is the median of these numbers? 29, 8, 4, 11, , 8, 11, 19, 29

What is the median of these numbers? 31, 7, 2, 12, 14, , 7, 12, 14, 19, = 26 2)2)

What is the median of these numbers? 53, 5, 81, 67, 25, = 120 2)2) 5, 25, 53, 67, 78, 81

Definition Mode is the most Popular

Mode What type of hat is the mode? Baseball caps are the mode.

Definition Mode Mode – the number that appears most frequently in a set of numbers. 1, 3, 7, 10, 13 Mode = 1

How to Find the Mode in a Group of Numbers Step 1 – Arrange the numbers in order from least to greatest. 21, 18, 24, 19, 18 18, 19, 21, 24

How to Find the Mode in a Group of Numbers Step 2 – Find the number that is repeated the most. 21, 18, 24, 19, 18 18, 18, 19, 21, 24

Which number is the mode? 1, 2, 2, 9, 9, 4, 9, , 2, 4, 9, 10

Which number is the mode? 22, 21, 27, 31, 21, , 22, 27, 31, 32

Definition Range is the distance Between

Range Range – the difference between the greatest and the least value in a set of numbers. 1, 3, 7, 10, 13 Range = 12

How to Find the Range in a Group of Numbers Step 1 – Arrange the numbers in order from least to greatest. 21, 18, 24, 19, 27 18, 19, 21, 24, 27

How to Find the Range in a Group of Numbers Step 2 – Find the lowest and highest numbers. 21, 18, 24, 19, 27 18, 19, 21, 24, 27

How to Find the Range in a Group of Numbers Step 3 – Find the difference between these 2 numbers. 18, 19, 21, 24, – 18 = 9 The range is 9

What is the range? 29, 8, 4, 8, – 4 = 25 4, 8, 19, 29

What is the range? 22, 21, 27, 31, 21, – 21 = 11 21, 22, 27, 31, 32

Definition Outlier Outlier – an extreme high or low number in a given set of data. 1, 30, 32, 35, 400

How to Find the Outlier Step 1: Arrange the numbers in order from least to greatest. Then, circle the really high or low number. 18, 19, 21, 24, 270