1. 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 right-tailed test at a 17% significance level is 0.57. c.) The critical z-score for a two-sided test at a 3% significance level is 2.17. d.) The critical z-score for a two-sided test at a 5% significance level is 1.65. 2. What value of z* should be used to construct a 95% confidence interval of a population mean? Answer choices are rounded to the hundredths place.

a.)
1.96
b.)
1.65
c.)
3.29
d.)
2.58