A shop records the number of customers who came in on 11 different days: 22, 25, 27, 30, 31, 34…

Step 1. The median. The sixth value is $34$.

Step 2. The quartiles. The lower half is $22, 25, 27, 30, 31$, with median $Q_1 = 27$. The upper half is $36, 40, 42, 45, 58$, with median $Q_3 = 42$.

Step 3. The IQR. $42 - 27 = 15$.

Step 4. The fences. The upper fence is $42 + 1.5 \times 15 = 64.5$. The lower fence is $27 - 22.5 = 4.5$.

Step 5. Outliers. The smallest value $22$ is above $4.5$ and the largest value $58$ is below $64.5$. There are no outliers.