Start with four rows: two pilot rows and two standard rows.
After the filter program = pilot, only North and East remain.
The chart is still useful as a readout of those two rows, but it should be labeled n = 2 and small. Do not treat it like a broad pattern.
A tiny sample-size readout: filter pinned rows, count n before reading the chart, and label the chart small when only two rows remain.
highlighted = computed this step
Load rows
Start with 4 pinned rows.
all rows
Filter the readout
Keep only rows where program is pilot.
program = pilot
Count n first
Count the filtered rows before reading the chart: n = 2.
small n
Label the chart small
Label the readout small because it has only 2 rows.