STATISTICAL TECHNIQUES AND TOOLS
T DISTRIBUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Level of significance
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Percentiles
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Degree of freedom
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Probability
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Detailed explanation-1: -Degrees of freedom refer to the maximum number of logically independent values, which may vary in a data sample. Degrees of freedom are calculated by subtracting one from the number of items within the data sample.
Detailed explanation-2: -Double chi tests and t-tests are two examples of how degrees of freedom can be included in mathematical calculations. There are several different types of t-tests and chi-square tests that can be divided by the number of degrees of freedom used.
Detailed explanation-3: -Therefore, this vector has n − 1 degrees of freedom. Mathematically, the first vector is the Oblique projection of the data vector onto the subspace spanned by the vector of 1’s. The 1 degree of freedom is the dimension of this subspace.