ANALYZING DATA VISUALIZATION

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What is data visualization?

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Data visualization is the graphical representation of information and data. By using visual elements like charts, graphs, and maps, data visualization tools provide an accessible way to see and understand trends, outliers, and patterns in data.

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What is a median in data analysis?

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The median is the middle value in a list of numbers. To find the median, the numbers must be arranged in order, and the median is the number that separates the higher half from the lower half.

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How do you determine the range of a data set?

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The range is calculated by subtracting the smallest value in the data set from the largest value. It shows the spread of the data.

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What does the x-axis typically represent in a graph?

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The x-axis usually represents the independent variable or the variable that is controlled in an experiment, often time or categories.

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What is a survey in data collection?

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A survey is a method of gathering information from individuals, typically by asking questions to collect data on opinions, behaviors, or characteristics.

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What is the importance of sample size in surveys?

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Sample size is crucial because it affects the reliability and validity of the survey results. A larger sample size generally leads to more accurate and generalizable results.

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What is a bar graph used for?

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A bar graph is used to compare different groups or to track changes over time. It displays data with rectangular bars where the length of each bar is proportional to the value it represents.

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What is a line graph used for?

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A line graph is used to display information that changes over time. It connects individual data points with a line, making it easy to see trends.

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What does it mean if a data set has a high variance?

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A high variance indicates that the data points are spread out over a wider range of values, meaning there is a greater difference between the values.

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What is a pie chart?

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A pie chart is a circular statistical graphic that is divided into slices to illustrate numerical proportions. Each slice represents a category's contribution to the total.