Lecture Notes for STAT 104 - INTRO TO STATISTICS at Iowa State (ISU)

Notes Information

Material Type:Class Note
University:Iowa State University
Term:Spring 2004
  • Response Variable
  • No Correlation
  • Association
  • Relationship
  • Qualitative
  • Determination
  • Interpretation
  • Positive Correlation
  • Deprivation
  • Variability
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Sample Document Text

1 1 Chapter 3 Descriptive Analysis and Presentation of Bivariate Data 2 Bivariate Data When collecting data, sometimes we measure more than one variable on each individual. Bivariate data is data consisting of the values of two different response variables that are obtained from the same population element. There are three possible combinations of variables that may be measured. 1. Both variables are qualitative 2. One variable is qualitative and the other is quantitative 3. Both variables are quantitative When two values are measured on each population unit, we denote the data as ordered pairs (x, y). In some examples we will see that x is the input variable and y is the response variable. 3 Both Variables are Qualitative We often arrange the data in a cross-tabulation or contingency table. These tables count all possible combinations of the levels of the variables. After counting the numbers, we make the tables with percentages listed in each of the respective categories....

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