In a z test for a sample mean, the critical z value is -1.93. The obtained z score of the sample mean is -1.97. Should the researcher reject the null hypothesis and why?
1) No, because the z score is less extreme than the critical z value
2) No, because the z score is more extreme than the critical z value
3) Yes, because the z score is less extreme than the critical z value
4) Yes, because the z score is more extreme than the critical z value