Frequency Distributions

Front

What is a frequency distribution?

Back

A frequency distribution is a summary of how often different values occur within a dataset, typically represented in a table or graph.

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What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, where the data is divided into bins or intervals, and the height of each bar represents the frequency of data points within that interval.

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What is the difference between absolute frequency and relative frequency?

Back

Absolute frequency refers to the count of occurrences of a particular value or range in a dataset, while relative frequency is the proportion of the total number of observations that fall within that value or range.

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How do you calculate relative frequency?

Back

Relative frequency is calculated by dividing the absolute frequency of a class by the total number of observations.

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What are class boundaries in a frequency distribution?

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Class boundaries are the values that separate classes in a frequency distribution, ensuring that there are no gaps between classes.

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What is the lower boundary of a class?

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The lower boundary of a class is the smallest value that can be included in that class.

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What is the upper boundary of a class?

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The upper boundary of a class is the largest value that can be included in that class.

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How do you find the class width in a frequency distribution?

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Class width is calculated by subtracting the lower boundary of a class from the lower boundary of the next class.

Front

What is cumulative frequency?

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Cumulative frequency is the running total of frequencies up to a certain class in a frequency distribution.

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How do you estimate the frequency of a class from a histogram?

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To estimate the frequency of a class from a histogram, observe the height of the bar corresponding to that class and use it to determine the approximate count of data points.