Stephen Few suggests four major encodings: bars, lines, points, and boxes. Bar charts show values by length of bars, can be vertical or horizontal. Line charts display continuous measurements over time. Scatter plots show relationships between two numeric variables. Box plots summarize value distribution using boxes and whiskers
Charts transform numerical data into visual representations for better analysis. Graphs emphasize raw data transformation and trends over time. Charts excel in representing large datasets and breaking down complexity
Line graphs show data trends over time. Bar graphs compare categories using numeric values. Box plots visualize data distribution and quartiles. Pie charts compare parts of a whole
Quantitative data uses numeric values (discrete and continuous). Qualitative data consists of categorical and ordinal characteristics. Graph choice depends on data type and measurement
Data visualization is crucial for effectively communicating numerical information. Charts help tell stories behind numerical data points. No statistical expertise is necessary to create graphs
Writing task requires summarising and comparing features from bar and pie charts. Minimum 150-word formal report needed. Questions test identifying key features and making comparisons