Honors Algebra I Chapter 10 Vocabulary

bar graph

A graphic form using bars to make comparisons of statistics.

cumulative frequency

The sum of frequencies of all proceeding events.

distribution

A graph for table that shows the theoretical frequency of each possible data value.

dot plot

A diagram that shows the frequency of data on a number line; also called a line plot.

frequency table

A chart that indicates the number of values in each interval.

histogram

A graphical display that uses bars to display numerical data that have been organized into equal intervals.

joint frequencies

In a two-way frequency table, joint frequencies display the frequency of two conditions happening together.

linear transformation

One or more operations performed on a set of data that can be written as a linear function.

marginal frequency

In a two-way frequency table, marginal frequencies are totals for each row or column.

mean

The sum of numbers in a set of data, divided by the numbers of items in a data set.

measures of center

Measures of average (also called central tendency). The most common are mean, median, and mode.

median

The middle number in a set of data when the data are arranged in numerical order. If the data set has an even number, the median is the mean of the two middle numbers.

mode

The number(s) that appear most often in a set of data.

percentile

A measure that tells what percent of a data set are below a reported value in the set.

qualitative data

Data that can be categorized, but not measured.

quantitative data

Data that can be measured.

relative frequency

The number of times in event occurred compared to the whole.

skewed distribution

When the majority of data is on the left or right side.

standard deviation

The square root of the variance.

symmetric distribution

when data is evenly distributed.

two-way frequency table

The table used to organize the frequency of data in two categories.