Mean, Median & Mode (Example/ Practice )

Mean, Median & Mode (Example/ Practice )

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  Mean, Median, andMode Mean (Average) Definition: The average of a group of numbers. Formula: Mean = Sum of all values ÷ Number of values 1. Add all the numbers. 2. Count how many numbers there are. 3. Divide the sum by the count. Example Numbers: 2, 4, 6 Step 1: 2 + 4 + 6 = 12 Step 2: Count = 3 Step 3: 12 ÷ 3 = 4 Mean = 4 Median (Middle) Definition: The middle value after arranging the numbers from smallest to largest. 1. Arrange the numbers from smallest to largest. 2. Find the middle. 3. If there is an even number of values, average the two middle numbers. Example (Odd) Numbers: 7, 3, 5 Step 1: Arrange → 3, 5, 7 Step 2: Middle number = 5 Step 3: Median = 5 Example (Even) Numbers: 2, 4, 6, 8 Step 1: Arrange → 2, 4, 6, 8 Step 2: The middle numbers are 4 and 6. Step 3: (4 + 6) ÷ 2 = 5 Median = 5 Mode (Most Repeated) Definition: The value that occurs most frequently in a dataset. 1. Look at all the numbers. 2. See which number appears most often. 3. That number is the mode. Example Numbers: 2, 3, 3, 4, 5 Step 1: Count how many times each number appears. Step 2: 3 appears most often (twice). Step 3: Mode = 3 Practice Assessment A. Find the Mean B. Find the Median C. Find the Mode 1. 4, 6, 8 _______________ 2. 5, 10, 15, 20 _______________ 3. 3, 7, 5, 9 _______________ 4. 12, 14, 16, 18 _______________ 5. 2, 4, 6, 8, 10 _______________ 6. 8, 10, 12, 14, 16 _______________ 7. 5, 1, 3 _______________ 8. 8, 2, 6, 4, 10 _______________ 9. 20, 10, 40, 30 _______________ 10. 9, 3, 7, 5 _______________ 11. 12, 4, 8, 6, 10 _______________ 12. 15, 5, 20, 10, 25, 30_______________ 13. 2, 3, 3, 4, 5 _______________ 14. 6, 6, 4, 5, 6, 7 _______________ 15. 1, 2, 2, 3, 3 _______________ 16. 4, 5, 6, 7 _______________ 17. 8, 9, 8, 10, 8, 9 _______________ 18. 5, 5, 6, 6, 7, 8, 5 _______________ Answers A. Find the Mean B. Find the Median C. Find the Mode 1. 6 7. 3 13. 3 2. 12.5 8. 6 14. 6 3. 6 9. 25 15. Modes: 2 and 3 4. 15 10. 6 16. No mode 5. 6 11. 8 17. 8 6. 12 12. 17.5 18. 5