A data display is a way to organise raw numbers so you can see patterns quickly. The simplest display is a frequency table: count how many times each category occurs, then you can turn those counts into proportions by dividing each frequency by the total number of observations. Proportions tell you what fraction or percentage of the whole each category represents. For quantitative data, a stem‑and‑leaf plot keeps the actual values while showing their distribution. The "stem" is the leading digit(s) and the "leaf" is the final digit; each leaf is placed next to its stem in order. This lets you read off the smallest and largest values, count how many data points fall in each interval, and spot clusters or gaps without losing any information.
No problems in this chapter yet — imports and generated practice are on the way.