Which of the following are true?

1. t- score is typically higher than z-score

2. For t-distribution, the degree of freedom is n + 1

3. t-distribution makes you a bit more conservative when it comes to rejecting the Null hypothesis.

4. z-table becomes like t-table when the sample size decreases

5. t- distribution will predict a bigger confidence interval than the z-distribution for the same confidence leve