In an influenza epidemic, the number of cases diagnosed in a week were as follows:
|
Day |
Monday |
Tuesday |
Wednesday |
Thursday |
Friday |
Saturday |
Sunday |
|
Number of Cases |
10 |
12 |
8 |
16 |
9 |
14 |
4 |
The 3-day moving averages are:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 10, 12, 11, 13, 9
Given data (number of cases per day): 10, 12, 8, 16, 9, 14, 4
Three-day moving averages (3-day MA):
MA₁ = (10 + 12 + 8)/3 = 30/3 = 10
MA₂ = (12 + 8 + 16)/3 = 36/3 = 12
MA₃ = (8 + 16 + 9)/3 = 33/3 = 11
MA₄ = (16 + 9 + 14)/3 = 39/3 = 13
MA₅ = (9 + 14 + 4)/3 = 27/3 = 9
Three-day moving averages: 10, 12, 11, 13, 9