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 dataset?

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A dataset is a collection of related data that is usually presented in a table format, where each row represents a record and each column represents a variable.

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What does it mean to 'clean' data?

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Cleaning data involves correcting or removing inaccurate, incomplete, or irrelevant data from a dataset to improve its quality.

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What is a mean in data analysis?

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The mean is the average of a set of numbers, calculated by adding all the numbers together and dividing by the count of numbers.

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What is a median?

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The median is the middle value in a list of numbers sorted in ascending order. If there is an even number of values, the median is the average of the two middle numbers.

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What is a mode?

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

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What is a bar graph?

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

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What is a line graph?

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A line graph is a type of chart that displays information as a series of data points called 'markers' connected by straight line segments.

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What is a pie chart?

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A pie chart is a circular statistical graphic divided into slices to illustrate numerical proportions.

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What is a frequency table?

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A frequency table is a table that displays the number of times each value occurs in a dataset.