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In a T-test, will the critical value be closer to zero or further from zero for...

In a T-test, will the critical value be closer to zero or further from zero for a one-tailed test compared to a two-tailed test?

Please explain why conceptually, I'm having trouble understanding the purpose of the critical value

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Answer #1

Critical value of t test depends on sample size, level of significance and whether the test is two tail or one tail. We explain this via example:

From the above discussion we see that for t distribution with 10 degrees of freedom critical value for both tail test =2.2281 and critical value for one tail test=1.8125 so the critical value be closer to zero or further from zero for a one-tailed test compared to a two-tailed test.

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