survey
a method for collecting information by asking statistical questions
population
an entire set of items from which data can be selected
parameter
a characteristic of a population
data
the facts or numbers that describe the results of an experiment or survey
statistical question
a question about a population or a sample
experiment
a test performed to answer a question
data analysis
collecting, organizing, and analyzing data to answer statistical questions
statistic
the characteristic of a sample
sample
a selection from a population
bar graph
a way of displaying categorical data by using either horizontal or vertical bars so that the height or length of the bars indicates the value for that category
discrete data
data that only has values that are counting numbers
frequency
the number of times an item or number occurs in a data set
categorical data
data for which each piece of data fits into exactly one of several different groups or categories
circle graph
a graph that shows how parts of the whole relate to the whole, and how parts relate to the other parts
key
explains how each data set is represented by a color or a pattern
double bar graph
used to display categorical data when each category contains two different data sets; two bars which represent each category are side by side, and space is used to separate the categories
quantitative data
data which can be placed on a numerical scale
stacked bar graph
a graph in which the frequencies of two different groups for a given category are stacked on top of one another in order to compare the parts to the whole
continuous data
data that has values that are between two counting numbers
