Data visualizations

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What is data visualization?

Back

Data visualization is the graphical representation of information and data. By using visual elements like charts, graphs, and maps, data visualization tools provide an accessible way to see and understand trends, outliers, and patterns in data.

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What is relative frequency?

Back

Relative frequency is the ratio of the number of times an event occurs to the total number of trials or observations. It is often expressed as a percentage.

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What does it mean if data is skewed right?

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If data is skewed right, it means that the tail on the right side of the distribution is longer or fatter than the left side. This indicates that there are a number of unusually high values.

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What does it mean if data is skewed left?

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If data is skewed left, it means that the tail on the left side of the distribution is longer or fatter than the right side. This indicates that there are a number of unusually low values.

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What is a dot plot?

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A dot plot is a simple statistical chart that consists of dots plotted on a number line. Each dot represents one observation.

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What is the interquartile range (IQR)?

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The interquartile range (IQR) is a measure of statistical dispersion, which is the difference between the first quartile (Q1) and the third quartile (Q3). It represents the range of the middle 50% of the data.

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What is a symmetrical distribution?

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A symmetrical distribution is one where the left and right sides of the distribution are mirror images of each other. The mean, median, and mode of a symmetrical distribution are all equal.

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How do you calculate the percentage of data within a certain range?

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To calculate the percentage of data within a certain range, divide the number of data points that fall within that range by the total number of data points, then multiply by 100.

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What is a histogram?

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A histogram is a type of bar chart that represents the frequency distribution of numerical data. It shows the number of data points that fall within a specified range of values.

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What is a box plot?

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A box plot, or box-and-whisker plot, is a standardized way of displaying the distribution of data based on a five-number summary: minimum, first quartile (Q1), median, third quartile (Q3), and maximum.