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 the range in a data set?

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

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How do you calculate the mean of a data set?

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To calculate the mean, add all the numbers in the data set together and then divide by the number of values.

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What is the median of a data set?

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The median is the middle value when the numbers are arranged in 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 in statistics?

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

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How do you find the median of an even set of numbers?

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Arrange the numbers in order, then take the average of the two middle numbers.

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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, often organized in a table.

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What is the importance of outliers in data analysis?

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Outliers can significantly affect the results of data analysis, skewing the mean and potentially leading to incorrect conclusions.

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What is a frequency distribution?

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A frequency distribution is a summary of how often each value occurs in a data set.

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What is a histogram?

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A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within specified ranges.