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In my humble opinion, what people mean with a statistical variable is the same as a random variable, which is explained well in wikipedia: http://en.wikipedia.org/wiki/Random_variable.
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∙ 16y ago
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Why are control groups used in statistical studies?
Because its the group for which the idependent variable is help constand in a statistical study.
Which statistical tool is applicable in describing nominal variable?
Mean
Is standard deviation a statistic associated with a study?
No, it is a statistical measure of the spread of a distribution of some variable.
What are dummies variables?
A dummy variable is a variable that takes on the values 1 and 0; 1 means something is true. These are used in statistical analyses.
How does standard deviation of 0 affect statistical significance?
Standard deviation of 0 can only be attained if all observations are identical. That is, the variable in question has just one possible value so statistical considerations are irrelevant.
What is a blocking variable?
It is a categorical variable such as a subject's gender or race which are not experimental conditions but are still included into the statistical analysis as a mean of statistical control.
Why are control groups used in statistical studies?
Because its the group for which the idependent variable is help constand in a statistical study.
Which statistical tool is applicable in describing nominal variable?
Mean
2 categorical independent variable and 1 interval dependent variable statistical test?
Two way ANOVA
The multiple regression statistical method is used to examine what relationship?
The multiple regression statistical method examines the relationship of one dependent variable (usually represented by 'Y') and one independent variable (represented by 'X').
How are mean median and mode alike?
They are statistical measures of the central tendency of a variable.
What are different variables that affect the output variable?
Statistical Process ControlA) TrueB) False
Does it matter if your dependent variable is normally distributed?
No, it does not. In fact, for many statistical analyses, it is a definite advantage.
Is standard deviation a statistic associated with a study?
No, it is a statistical measure of the spread of a distribution of some variable.
What are dummies variables?
A dummy variable is a variable that takes on the values 1 and 0; 1 means something is true. These are used in statistical analyses.
What it the difference between a categoric dependent variable and a continuous dependent variable?
A dependent variable that can take on an infinite or at least very large number of values, such as rate of return. In statistical analysis, a dependent variable that is grouped into two or more categories such as solvency/insolvency.
How does standard deviation of 0 affect statistical significance?
Standard deviation of 0 can only be attained if all observations are identical. That is, the variable in question has just one possible value so statistical considerations are irrelevant.
