Bargraph
Vertical or horizontal bars who is heights represent the frequencies of the data
Bargraph
categorical frequency distribution
used for data that can be placed in specific categories such as nominal or ordinal level data
categorical frequency distribution
class
raw data placed in to a qualitative or quantitative category
class boundaries
the numbers that separate classes without forming gaps between them
class boundaries
the numbers used to separate the classes, but without the gaps created by class limits
class midpoint
the sum of consecutive lower class limits divided by 2
class midpoint
class width
the difference between consecutive lower class limits
class width formula
(maximum data value) - (minimum data value) /
number of classes
compound bar graphs
Bar graphs used to compare data for two or more groups
compound bar graphs
cumulative frequency distribution
the sum of the frequencies accumulated up to the upper boundary of a class in a frequency distribution
dotplot
A simple graph that shows each data value as a dot above its location on a number line.
frequency
number of data values contained in a specific class
frequency distribution
the organization of raw data in table form, using classes and frequencies
frequency polygon
line graph for frequencies at the midpoint of the classes.
frequencies are the height
grouped frequency distribution
a distribution used when the range is large and classes of several units in width are needed
histogram
A graph of vertical bars, of various heights, representing the frequencies of a distribution
lower class limit
the lowest data value that can fit in a class
ogive
a graph that represents the cumulative frequencies for the classes in a frequency distribution
open-ended distribution
a frequency distribution that has no specific beginning value or no specific ending value
Pareto chart
chart that uses vertical bars to represent frequencies for a categorical variable
raw data
data collected in original form
relative frequency graph
a graph using proportions instead of raw data as frequencies
stem and leaf plot
a data plot that uses part of a data value as the stem and part of the data value as the leaf to form groups or classes
ungrouped frequency distribution
a distribution that uses individual data and has a small range of data
upper class limit
the highest data value that can fit in a class
pie chart
circle that is divided into sections according to the percentage of frequencies in each category of the distribution
time series graph
represents data that occur over a specific period of time
line graph