Why are t statistics more variable than z-scores?

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3. Why are t statistics more variable than z-scores? The extra variability is caused by variations in the sample mean a. b. The extra variability is caused by variations in the sample variance. c. The extra variability is caused by variations in the df value. d. None of the other options explains the extra variability for t statistics

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Answer

t value also depend on degrees of freedom so extra variability
is caused by df values.

Option C is correct.


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