Data Analysis Math

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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 Statistical Question?

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A statistical question is one that anticipates variability in the data and can be answered by collecting data.

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What is a Non-Statistical Question?

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A non-statistical question is one that can be answered with a single value or fact, without the need for data collection.

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What is the Median?

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The median is the middle value in a list of numbers sorted in ascending or descending order.

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How do you find the Median of a set of numbers?

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To find the median, arrange the numbers in order and identify the middle number. 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 Categorical Variable?

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A categorical variable is a type of variable that can take on one of a limited, fixed number of possible values, assigning each individual or other unit of observation to a particular group.

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What is a Numerical Variable?

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A numerical variable is a type of variable that represents a measurable quantity and can be expressed as a number.

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What is the difference between Mean and Median?

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The mean is the average of a set of numbers, while the median is the middle value when the numbers are arranged in order.

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What is a Data Set?

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A data set is a collection of related sets of information composed of separate elements but treated as a single unit.

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What is the mode of a data set?

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