Topic 2: Descriptive Statistics Vocab

Front

Variance

Back

The standard deviation squared (σ2)

Front

Left skewed

Back

The data has a left tail. Which affects the mean value of the data.

Mean < Median < Mode.

Front

Right Skewed

Back

Right skewed - The data has a right tail. Which affects the mean value of the data.

Mean > Median > Mode.

Front

Uniform distribution

Back

Probability distributions with equally likely outcomes.

Front

Stem and leaf

Back

A special table where each data value is split into a stem (the first digit or digits) and a leaf (usually the last digit). The stem is the tens place. The leaf is the ones place. The number 152 would read 15 | 2.

Front

Line graph

Back

A graph that uses lines to connect individual data points. A line graph displays quantitative values over a specified time interval.

Front

Box plot

Back

A graph summarizing a set of data. The shape of the boxplot shows how the data is distributed and it also shows any outliers.

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

Front

Histogram

Back

A graph that shows the frequency of numerical data using rectangles. The height of a rectangle (the vertical axis) represents the distribution frequency of a variable (the amount, or how often that variable appears).

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

Front

Class width

Back

 lower class - lower class

or

upper class - upper class.

Front

Class midpoints

Back

 (lower class + upper class)/2

Tags

CCSS.6.SP.B.5C