Mean, Median, Mode and Range By Miss Setchell
Definitions Mean – Average Median – Middle number Mode – Number seen the most often Range – Difference between the highest and lowest number Sum – The answer to an addition problem Addend – The numbers you added together to get the sum
Finding the mean is like evening out the numbers. 2, 5, 2, 1, 5
Finding the mean is like evening out the numbers. 2, 5, 2, 1, 5
Finding the mean is like 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, 26 8+10+12+18+22+26 = 96
How to Find the Mean of a Group of Numbers Step 2 – Divide the sum by the number of addends. 8, 10, 12, 18, 22, 26 8+10+12+18+22+26 = 96 How many addends are there?
How to Find the Mean of a Group of Numbers Step 2 – Divide the sum by the number of addends. 1 6 6) 96 # of addends sum 6 3 6 3 6
What is the Mean of this set of numbers? The mean or average of these numbers is 14. 8, 10, 12, 18, 22, 26
What is the Mean of this set of numbers? The mean or average of these numbers is 15. 9, 11, 13, 20, 24
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 21+ 25 = median 23 2) 46
What is the median of these numbers? 16, 10, 7 7, 10, 16
What is the median of these numbers? 18, 23, 8, 14, 6, 27 6, 8, 14, 18, 23, 27 Median is 16
What is the Mode of a group of numbers? -The number that occurs the most often 22, 13, 24, 12, 12, 23, 12
What is the Mode of a group of numbers? Step 1 – Put the numbers in order from least to greatest. 22, 13, 24, 12, 12, 23, 12 12, 12, 12, 13, 22, 23, 24
What is the Mode of a group of numbers? Step 2 – Find the number that occurs the most often. 12, 12, 12, 13, 22, 23, 24
What is the Mode of a group of numbers? - 12 is the number that occurs most often. 12, 12 12, 12, - 12 is the Mode.
What is the Mode of this group of numbers? The Mode is 15. 14, 15, 12, 11, 24, 15, 23
What is the Mode of this group of numbers? The Mode is 35. 35, 21, 56, 35, 23, 14, 12
What is the Mode of this group of numbers? There is no number that occurs more than once. 16, 12, 18, 29, 36, 11, 10 So, there is no Mode for this group of numbers.
Range – the difference between the greatest and the least value in a set of numbers. 1, 1, 3, 7, 10, 13 13-1= __ 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 – Find the lowest and highest numbers. 18, 19, 21, 24, 27
How to Find the Range in a Group of Numbers Step 3 – subtract the lowest number from the highest number. 18 27 – 18 = ___ , 19, 21, 24, 27 The Range is 9.
What is the range? 29, 8, 4, 8, 19 4, 8, 8, 19, 29 29 – 4 = 25 range
What is the range? 22, 21, 27, 31, 21, 32 21, 21, 22, 27, 31, 32 32 – 21 = 11 range
Review Mean – Average Median – Middle number Mode – Number seen the most often Range – Difference between the highest and lowest number Sum – The answer to an addition problem Addend – The numbers you added together to get the sum
Quiz Find the Mean, Median, Mode and Range of this group of numbers: 3, 6, 4, 2, 7, 1, 8, 3, 5
3, 6, 4, 2, 7, 1, 8, 3, 5 Mean- Median- Mode- Range- Hint: Put the numbers in order from least to greatest before you begin. Mean- Median- Mode- Range-