Find the critical value to with df= 20 and C.L= 90% O ta = 1.325 O ta = 0.05 O ta = 1.725 O ta = 1.452 D Question 2 Find the value of Za when a = 0.1 O Za = 2.576 O Za = -1.96 O ZA = 1.645 O Za = 2.33