T or F
The main reason a research uses a t-test instead of a z-test iswhen little is known about population (mean and standarddeviation).
Values in the tâ€table are not actually listed by samplesize but by degrees of freedom (df).
A 90 percent confidence level is equivalent to an alpha level of0.10
The critical value of tâ€table for a study with 6participants with alpha set @ .1 one tail is 1.711
