The ages (in years) of 8 students in a class are: 12, 15, 13, 14, 16, 15, 14, 13. Find the mean age.
Answer
Mean = 14.125 years
The correct answer is Mean = 14.125 years — Hence the mean age is 14.125 years.
Step-by-step solution
- Add all the ages: 12+15+13+14+16+15+14+13 = 112.
- Count the number of students: 8.
- Divide the sum by the count: 112 ÷ 8 = 14.125.
- Hence the mean age is 14.125 years.
Common mistake: Dividing by wrong number of observations or forgetting to add all values
Concept tested: Mean of ungrouped data
Published · How this solution was prepared and checked
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