JoVE | Peer Reviewed Scientific Video Journal - Methods and Protocols

Student's T-Test

SOLVED: 1. Student's t test for correlated groups really reduces to .a.the sign testb.Student's t test for single samples using difference scoresc.Students t test for independent groupsd.none of the above2. The z test for independent groups is seldom used because .it lacks sensitivityit is too complicatedwe seldom know the population variancesthe sampling distribution of z under H0 is unknown3. In a t test, when the size of the sample is increased, the confidence interval .increasesd

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T Test (Student's T-Test): Definition and Examples