Data Analysis

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What is data analysis?

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Data analysis is the process of inspecting, cleaning, transforming, and modeling data to discover useful information, inform conclusions, and support decision-making.

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What is a data set?

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A data set is a collection of related data points or values that can be analyzed.

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What does it mean to find the mean of a data set?

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The mean is the average of a data set, calculated by adding all the values together and dividing by the number of values.

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What is the median in a data set?

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The median is the middle value when the data set is ordered from least to greatest.

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What is the mode in a data set?

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The mode is the value that appears most frequently in a data set.

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What is a range in data analysis?

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The range is the difference between the highest and lowest values in a data set.

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What does it mean for data to be skewed?

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Skewed data is not symmetrical and has a tail on one side; it can be skewed left (negatively) or skewed right (positively).

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What is a bar graph?

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A bar graph is a visual representation of data using bars to compare different categories.

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What is a histogram?

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A histogram is a type of bar graph that represents the frequency distribution of numerical data.

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What is a line graph?

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A line graph is a visual representation of data points connected by lines, often used to show trends over time.