Examlex
One of the variables that are being considered for inclusion in a multiple regression model is marital status of the customer. There are four possible responses listed for this variable. Based on this, three dummy variables will need to be created and incorporated into the regression model.
Robustness
The ability of a statistical method or test to remain effective under a variety of conditions or assumptions, or when faced with violations of those assumptions.
Sign Test
A non-parametric test used to evaluate the difference between paired samples, based on the direction of the differences between the pairs, not their magnitude.
T Test
A statistical test used to compare the means of two groups or the mean of one group with a known value, under the assumption of normally distributed data.
T Procedure
A statistical method used to test the mean of a population, especially useful when dealing with small sample sizes and unknown population standard deviations.
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