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 mean in a data set?

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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 the median in a data set?

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The median is the middle number in an ordered set of data. If there is an even number of observations, the median is the average of the two middle numbers.

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What is the mode in a data set?

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

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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 find the median of a set of numbers?

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To find the median, first order the numbers from least to greatest. If the count of numbers is odd, the median is the middle number. If even, it is the average of the two middle numbers.

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What does it mean if a data set has no mode?

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If a data set has no mode, it means that no number appears more than once.

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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 together and divide by the total number of values.

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What is an outlier in a data set?

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An outlier is a value that is significantly higher or lower than the other values in a data set.

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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.