Internet of Things (IoT) Practice Exam

Which criteria can be used to determine the best chart selection for visualizing mined data?

1. Cost of data visualization tools

2. Number of variables shown and items requiring comparison

3. Complexity of data algorithms

4. Color schemes used in visualizations

The correct answer is: Number of variables shown and items requiring comparison

The choice highlighting the number of variables shown and items requiring comparison is significant because these factors directly influence how clearly and effectively the data can be communicated. When visualizing data, it's essential to match the chart type with the amount and complexity of the data being represented. For example, if you're working with multiple variables that need to be compared side by side, certain types of charts, like bar graphs or line charts, may be more suitable than others that are difficult to interpret in such scenarios, like pie charts. Selecting the appropriate chart type based on the number of variables helps ensure that the data is conveyed clearly to the audience, making comparisons easier and enhancing understanding. Also, illustrations that accommodate several data points and facilitate direct comparison are vital for conveying insights accurately. The other options can play a role in the broader context of data visualization but do not directly relate to the fundamental criteria for chart selection. While the cost of tools can impact accessibility, it does not dictate the appropriateness of the visual representation itself. Similarly, while the complexity of data algorithms is relevant to data processing and preparation, it does not directly inform the chart type needed for effective visualization. Lastly, color schemes are important for aesthetics and clarity but should be considered once the chart type has been determined based