Question
Forty patients with diarrhoeal diseases were studied. Their age distribution is given in the table below:
| Age (in years) | Number of patients |
|---|---|
| 0–4 | 22 |
| 5–9 | 12 |
| 10–14 | 6 |
What is the mean age of the patients in this study?
| A. |
2 years |
| B. |
4 years |
| C. |
5 years |
| D. |
6 years |
Show Answer
|
Correct Answer » C Explanation |
 |
Mean Age Calculation:
- Assign Midpoints for Age Groups:
- 0–4: Midpoint = 2
- 5–9: Midpoint = 7
- 10–14: Midpoint = 12
(22×2)+(12×7)+(6×12)=44+84+72=200
- Divide by Total Number of Patients:
- Total patients = 40
- Mean age = 200/40=5 years