A _____________ is one explanatory variable that was not considered in a study, but that affect the worth of the solution variable in the study.

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__________ is the process of using possibility to choose individuals indigenous a population to be had in the sample.
For a bell-shaped data distribution, __________ the data are within one standard deviation of the mean.
The mean and also standard deviation that a sample space 12 and also 3, respectively. The z-score that the data 18 is _________.
Generally, the score of an experiment is to determine the effect that treatments will have actually on the an answer variable.
A draft experiment is a controlled study carried out to identify the e ect that varyingone or more explanatory variable has on a an answer variable.

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If the scatter diagram of the residues has a pattern, climate the least-squares regression line isnot the suitable model.
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