📊 Line Plots & Mean

What is Mean (Average)?
The mean is the fair share — if you add all numbers and split equally among all items.
Formula:
Mean = Sum of all values ÷ Number of valuesSteps:
• Add up all numbers (find the sum)
• Count how many numbers (n)
• Divide sum by count

Example: Find mean of 5, 7, 12, 8
• Sum = 5 + 7 + 12 + 8 = 32
• Count = 4 numbers
• Mean = 32 ÷ 4 = 8

Median (Middle Value)
The median is the middle number when data is arranged in order.
Steps to Find Median:
• Arrange numbers from smallest to largest
• If odd count → middle number
• If even count → average of two middle numbers

Example (Odd): 3, 7, 9, 11, 15 → median = 9
Example (Even): 3, 7, 9, 11 → median = (7+9)/2 = 8
Mode (Most Frequent)
The mode is the value that appears most often.
• One mode: 2, 2, 3, 4, 5 → mode = 2
• Two modes (bimodal): 1, 1, 2, 2, 3 → modes = 1 and 2
• No mode: 1, 2, 3, 4, 5 → no mode