Select the correct statement. a.) The critical z-score for a left-tailed test at a 25% significance level is -0.40.
b.) The critical z-score for a two-sided test at a 5% significance level is 1.65.
c.) The critical z-score for a right-tailed test at a 17% significance level is 0.57.
d.) The critical z-score for a two-sided test at a 3% significance level is 2.17.