Graphical Representation of Data
Q) What is the difference between mean, median, and mode?
Answer: Mean: Mean is the sum of all values divided by the number of observations. It is sensitive to outliers.
Median: Median is the middle value when data is arranged in ascending or descending order. It is not affected by outliers.
Mode: Mode is the most frequent value. It is not as informative as other measures.
Q) What is the importance of representing data using graphs, diagrams, and maps?
Answer: Representing data visually makes it easier to understand patterns and trends.
It allows for quick comparisons between different categories or groups.
Visual representation can help identify outliers and anomalies.
It can be more engaging and memorable than simply presenting numerical data.
Q) What are the three main types of diagrams used for representing data?
Answer: Line graphs: Used to show trends and changes over time.
Bar graphs: Used to compare different categories or groups.
Pie charts: Used to show the relative proportions of different parts of a whole.
Q) What are the different types of thematic maps?
Answer: Choropleth maps: Use colours or shades to represent different values across geographic areas.
Dot maps: Use dots to represent the distribution of data points across a map.
Isopleth maps: Use lines to connect points of equal value, such as temperature or rainfall.
Q) What is the purpose of a flow chart?
Answer: Flow charts are used to show the flow of something, such as goods, people, or information.
They can help identify bottlenecks or areas for improvement.
Q) What are the three main considerations when choosing a scale for a graph, diagram, or map?
Answer: The range of the data.
The size of the available space.
The desired level of detail.
Q) What is the difference between a simple bar graph and a compound bar graph?
Answer: A simple bar graph shows only one variable.
A compound bar graph shows multiple variables within each bar.
Q) What are the advantages and disadvantages of using a pie chart?
Answer: Advantages: Easy to understand, shows relative proportions.
Disadvantages: Not good for showing small differences, limited to showing a few categories.
Q) What is the importance of using a legend on a map or graph?
Answer: The legend explains the meaning of the symbols, colours, and labels used on the map or graph.
It makes the map or graph easier to understand and interpret.
Q) What are some of the best practices for designing graphs, diagrams, and maps?
Answer: Use clear and concise labels.
Choose colours and fonts that are easy to read.
Keep the design simple and uncluttered.
Make sure the scale is appropriate.
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