ll Chapter 2 -Key terms Data array An orderly presentation of data in either ascending or descending numerical order. Frequency Distribution a table that represents the data in classes and that shows the number of observations in each class o 2002 The Wadsworth GroupChapter 2 - Key Terms • Data array – An orderly presentation of data in either ascending or descending numerical order. • Frequency Distribution – A table that represents the data in classes and that shows the number of observations in each class. © 2002 The Wadsworth Group