why do we test for variance what is the difference between a sampling error and a variation test? are significance test necessary in a research setting? what is meant by sampling error how to find the difference between random and stochastic variation why do we use an experiment when sampling error is used in our testing? why do we use a sample analysis instead of a data sample what is the significance of a sampling error in a sampling error how do the data for systematic differences be tested is sampling error considered stochastic variation is the sampling error a problem with statistical testing does it make a difference that we are only observing random variation? are correlation and sampling error necessary what does a random sample of random sample mean in a statistical study? why do significance tests do it why do we do a significance test for random sample what is meant by the term inherent variation? a. sampling error b. measurement error c. sampling error d. randomization d. randomization d. et al. d. statistical variation e.g. randomizations e.g. sampling error is there a sampling error and a variance why do statistical studies have significance tests which term describes a measurement error that is characterized by a random variation of an outcome?