CHAPTER 3
DATA ACQUISITION: SAMPLING AND DATA PREPARATION
LEARNING OBJECTIVES
• Identify and distinguish between variable types
• Compare and contrast the scales of the measurement process
• Classify variables to the scales of measurement
• Understand sampling and sample selection with specific reference to simple random sampling
• Understand random number generation
• Understand how to access and prepare data
• Understand what missing data is and what impact it may have on your data set
Most statistics texts take the facile approach to data, which is to assume that the data were all successfully collected and made ready for analysis before anyone with an interest in statistical analysis came along. The happy result of this view is that the statistics ...
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