Term

Definition
in terms of statistics, size, and forms. 


Term

Definition
measure for symplifying large data sets to assist in analysis and display 


Term

Definition
number of classes and data classification schemes to be used in data generalization. 


Term
Nine Classification Schemes 

Definition
1. Natural Breaks
2. Optimization
3. Nested Means
4. Mean and Standard Deviation
5. Equal Interval
6. Equal Frequency
7. Arithmetic
8. Geometric
9. User defined. 


Term

Definition
the number of one item compared to the number of another item. 


Term

Definition
the ratio of the number of items in one group(class) to the total of all items 


Term

Definition
an associated amount based on a fraction of 100: also a proportion multiplied by 100 


Term

Definition
a ratio of the number of items to a standardized value, for example, general fertility rate 


Term

Definition
sort, rank order, range, mean, median, standard deviation, normal distribution 


Term

Definition
reordering of the data into numberical sequence 


Term

Definition
the sequencing of numbers arranged from high to low 


Term

Definition
the difference between the largest and smallest data values in a data set 


Term

Definition
the average of a class or data set determined by the summation of the data values divided by the number of observations 


Term

Definition
the middle value in a rankordered set of numbers 


Term

Definition
the most often occuring number or value in a data set 


Term

Definition
a measure of dispersion of observations about the mean 


Term

Definition
usually associated with larger data sets, the data are distributed symmetrically about the mean2 


Term
Three Steps in Data classification 

Definition
1. Selection of the number of classes
2. Classification procedure utilized
3. Analysis of Classification Accuracy



Term

Definition
division of a data set into classes based on breaks visible on a dispersion graph or histogram 


Term

Definition
a more sophisticated method of pursuing natural breaks from a quantitative, algorithmic standpoint. 


Term

Definition
a classification which uses the mean of the data set to identify two classes 


Term
Mean and Standard Deviation 

Definition
class ranges are determined for a normally distributed data set using the mean and stadard deviation steps above and below the mean. 


Term

Definition
classification scheme where the range of each class is the same 


Term

Definition
classification scheme where each class has the same number of observations 


Term

Definition
schemes that are useful when classifying data with significant ranges 


Term

Definition
useful for the dramatic ranges in population 


Term

Definition
arbitrary determination of clas breaks specified by cartographer 


Term
Maps gain their value in 3 ways 

Definition
1. A way of recording and storing information
2. a means for analyzing locational distributions and spatial patterns.
3. A method of producing information and communicating findings 

