The big picture
Ask well. Collect the same way. Say only what the rows show.
| Step | Remember | Example |
|---|---|---|
| A good question | Answers you can put side by side | "How many minutes to the gate?" |
| Same way every time | One method, run once per person | Skip "wait" and 3 rows go blank |
| The mean | Sum ÷ count. No value has to equal it | 129 ÷ 12 = 10.75 |
| Which chart | A chart compares groups. One row is a lookup | 3 ways to come: chart |
| What it shows | Only as wide as the rows behind it | 12 rows are not 16 students |
You just ran a small survey. Real data work starts the same way.
Next, a program learns from a table of rows.