Mean, Median, and Mode

math 4th quarter

Mean

The average of a set of numbers calculated by adding them together and dividing by the count of numbers.

Median

The middle value in a set of numbers when arranged in order.

Mode

The number that appears most frequently in a set of numbers.

Measures of Variability

Statistics describing the spread or dispersion of a set of data points, including range, variance, standard deviation, and interquartile range.

Ungrouped Data

Data points are individual values; variability measures like range, variance, and standard deviation are calculated directly from the data points.

Grouped Data

Data is grouped into intervals or classes; variability measures are calculated using class midpoints or frequencies within each class.