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# Carnegie Chapter 15

bar graph a way of displaying categorical data by using either horizontal or vertical bars on a graph. The height or length of each bar indicates the value for that category.
categorical data Data for which each piece of data fits into exactly one of several different groups, also called "qualitative" data.
circle graph A graph that shows how parts of the whole relate to the whole, and how parts of the whole relate to other parts.
Clusters Areas of the graph where data are grouped close together.
continuous data When quantitative data are a measurement of something and can have values that are between two counting numbers.
Data the facts or numbers that describe the results of an experiment or survey
data analysis Asking statistical questions and collecting, organizing, and analyzing data
discrete data When quantitative data are a count of how many, can only have values that are counting numbers (0, 1, 2, 3,...).
distribution The overall shape of a graph.
dot plot (sometimes called a line plot) is a graph that shows how the discrete data is graphed using a number line.
double bar graph is used when each category contains two different data sets.
Experiment Whenever you have a question and you collect the data to answer it by performing a test for which you decide the conditions.
Frequency The number of times an item or number occurs in a data set.
frequency table A table used to organize data according to how many times a data value occurs.
Gaps areas of the graph where there are no data
Histogram A graphical way to display quantitative or numerical data using vertical bars. The width of a bar represents an interval of data and is often referred to as a bin.
Key explains how each data set is represented by a color or a pattern in the graph.
Parameter A characteristic of a population.
Population An entire set of items from which data can be collected.
quantitative data data for which each piece of data can be placed on a numerical scale, also called "numerical" data.
Sample a selection from a population.
skewed left The peak of the data is to the right side of the graph. There are only a few data points to the left side of the graph.
skewed right The peak of the data is to the left side of the graph. There are only a few data points to the right side of the graph.
stacked bar graph A graph that stacks the frequencies of two different groups for a given category on top of one another so that you can compare the parts to the whole.
Statistic A characteristic of a sample.
statistical question a question about a population or a sample.
Survey A method for collecting information by asking statistical questions.
Symmetric The left and right halves of the graph are mirror images of each other. There is often a "peak" in the middle of the graph indicating there are many data values in the center of the graph.
side-by-side stem-and-leaf plot A graph that allows a comparison of the two data sets in two columns.
stem-and-leaf plot A graphical method used to represent ordered numerical data.
Created by: molnarmath