STATISTICAL TECHNIQUES AND TOOLS
T DISTRIBUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A z distribution would be the same as a t distribution with how many degrees of freedom?
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20
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30
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100
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infinite
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Explanation:
Detailed explanation-1: -The variance is always greater than 1, although it is close to 1 when there are many degrees of freedom. With infinite degrees of freedom, the t-distribution is the same as the standard normal distribution.
Detailed explanation-2: -Z Test Critical Values As I mentioned in the Z vs T test section, a Z test does not use degrees of freedom. It evaluates Z-scores in the context of the standard normal distribution. Unlike the t-distribution, the standard normal distribution doesn’t change shape as the sample size changes.
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