Efficient Statistics

These flashcards cover key vocabulary related to efficient statistics, including definitions and descriptions relevant to the course material.

Efficient Statistics

Statistics that are designed to extract the most information about a characteristic from a column of data values.

Mean

The arithmetic average of all of the data values in a column of data.

Standard Deviation

An approximation of the average deviation found by taking the square-root of the variance.

Deviation

How far a data value is from its mean value.

Variance

A standardized measure of spread for a column of data values found by dividing the sum of squares by the degrees of freedom.

Histogram

A graphical representation used to see the shape of distribution in data.

Sum of Squares

A raw measure of spread for a column of data values found by squaring all the deviations from the mean, then summing all the squares.