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Statistics
· Examples✏️ Worked Examples — Step by Step
E1
EasyMean of 4, 8, 6, 10, 12:
💡 Sum ÷ count.
👁 Show Solution
(4+8+6+10+12)/5 = 40/5 = 8. ✅ Answer: 8
✅8
E2
MediumMedian of 23, 17, 19, 25, 14, 21, 18:
💡 Sort first.
👁 Show Solution
Sorted: 14, 17, 18, 19, 21, 23, 25. Middle (4th of 7) = 19. ✅ Answer: 19
✅19
E3
ChallengingStandard deviation of 2, 4, 4, 4, 5, 5, 7, 9:
💡 Find mean first, then √(mean of squared deviations).
👁 Show Solution
Mean = 40/8 = 5. Deviations²: 9, 1, 1, 1, 0, 0, 4, 16. Sum = 32. Variance = 32/8 = 4. SD = √4 = 2. ✅ Answer: 2
✅2