The comparison distribution for a t test for independent means is a t distribution (as opposed to a normal curve) because:
A) tables are not available for the normal curve
B) the population variance is estimated
C) Z distributions were not used at the time the t test for independent means was invented
D) there are more degrees of freedom for a single sample than for when you use two samples
Correct Answer:
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Q9: The comparison distribution for a t test
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