Term

Definition
Data in its original form. 


Term

Definition
A raw data value that is placed in a quantitative or a qualitative category. 


Term

Definition
The number of data values contained in a specific class. 


Term

Definition
The organization of raw data in table form using classes and frequencies. 


Term
Categorical frequency distribution 

Definition
Used for data that can be placed in specific categories such as nominal or ordinallevel data 


Term

Definition
The decimal equilateral of a percent. 


Term
Grouped frequency distribution 

Definition
Data that is grouped into classes that are more than one unit in width. 


Term

Definition
The smallest data value that can be included in the class. 


Term

Definition
The largest data value that can be represented in a class. 


Term

Definition
Numbers that are used to separate the classes so that there are no gaps in the frequency distribution. 


Term

Definition
Found by subtracting the lower (or upper) class limit of one class from the lower (or upper) class limit of the next class. 


Term

Definition
Is obtained by adding the lower and upper boundaries and dividing by two. 


Term
Mutually exclusive classes 

Definition
Classes that have none overlapping class limits so that the data cannot be placed into two classes. 


Term

Definition
A frequency distribution with an openended class. 


Term
Cumulative frequency distribution 

Definition
A distribution that shows the number of data values less than or equal to a specific value (usually an upper boundary). 


Term
Ungrouped frequency distribution 

Definition
A frequency distribution that can be constructed using single data values for each class. 


Term

Definition
A graph that displays the data by using contiguous vertical bars of various heights to represent the frequencies of the classes. 


Term

Definition
A graph that displays the data by using lines that connect points plotted for the frequencies at the midpoint of the classes. 


Term

Definition
A graph that represents the cumulative frequencies for the classes in a frequency distribution. 


Term

Definition
A graph where the distributions are using proportions as opposed to raw data. 


Term

Definition
Has a single peak that tapers off at either end. It is approximately symmetric. 


Term

Definition


Term

Definition
Few data values on the left side and increases as it moves to the right.
A reverse shaped Jdistribution is the opposite. 


Term

Definition
Represents the data by using vertical or horizontal bars whose height or lengths represent the frequencies of the data. 


Term

Definition
Used to represent a frequency distribution for a categorical variable and the frequencies are displayed by the heights of vertical bars which are arranged in order from highest to lowest. 


Term

Definition
Represents data that occur over a specific period of time. 


Term

Definition
A circle that is divided into sections or wedges according to a percentage of frequencies in each category of the distribution. 


Term

Definition
A data plot that uses part of the data value as a stem and part of the data value as the leaf to form groups or classes. 


Term

Definition
A graph of order pairs of data values that is used to determine if a relationship exists between the two variables. 


Term
Positive linear relationship 

Definition
When the points fall approximately in an ascending straight line and both the x and y values increase at the same time. 


Term
Negative linear relationship 

Definition
When the points fall approximately in a descending straight line from left to right. 


Term

Definition
When the points fall in a curved line. No relationship exists when there is no discernible pattern of the points. 

