Artificial Intelligence
Data Interpretation and basic visualization
Practice questions
Why is it necessary to communicate uncertainty along with data in a scientific presentation?In an oral report a speaker presents data first and then gives an interpretation. Why is this order appropriate?What problem may arise if a chart has no title?A source is mentioned on a chart. What is the main benefit?In a data table, row headings and values are not aligned. What difficulty will arise?A bar graph begins its vertical axis at ninety instead of zero. Why may a small difference between two values appear very large?A chart uses an upward arrow to show growth even though the data is actually decreasing. What type of error is this?In a data graphic, both the height and width of a human icon are doubled. Approximately how large will its visual area become?Why can comparison become difficult when bars of different widths are used in a graph?A line graph has unequal time intervals but displays them at equal visual distances. What misunderstanding may occur?A graph shows rising average scores but the number of students differs each year. What should be checked before drawing a conclusion?In an election map large geographic regions appear more prominent although they contain fewer voters. What visual risk exists?A chart uses pictures of equal size for data values that are different. What is the error?A line graph shows time from right to left without any indication. What may happen?In a diagram, the size of objects changes in proportion to data values rather than their real-world size. For what purpose is this technique useful?A bar graph does not start its vertical axis at zero, making small differences appear very large. What type of visual problem is this?In a statistical graphic, three-dimensional columns make the front value appear larger than an equal value behind it. Why does this distortion occur?A local administration creates a chart showing citizen complaints by category and location. What is its purpose?A school attendance system records a student's name, time and identification number. Which would be an example of processed information?A school stores all student marks digitally but allows every employee to view the full record. What is the main problem?