We can be lied to only if we passive accept what is presented to use or accept a statement because we simply do not understand. Statistics is a tool used to organize information and to draw inferences about data. Any tool can be misused. Social and behavioral sciences rely heavily on statistics because of the large amount of variance inherent when studying behavior and mental processes. Individual Difference Measurement Error Unreliability Variabilty means we have less faith in any single score when drawing inferences.
Statistics quantifies variability and takes it inot account.
Also use for characterizing relationships between variables. Ordinal Scales not only put observations in exclusive and exhaustive categories but also rank order them. That is they tell you some about the nature of the difference between groups. So we can make general statements about greater than, less than or equal to. Interval Scales Includes the properties of nominal and ordinal but also tells us something about the difference between observations.