1. What is the critical value of a two tailed test alpha with a value below *using z-test. a = 0.05 a) +1.96 b) -1.96 c) +1.96 d) +1.65 2. What is the critical value of a left tailed test with an alpha value below *using z-test. a = 0.05 a) -1.96 b) +1.96 c) +1.96 d) +1.65 3. What is the critical value of a left tailed test with an and n = 15, using t-test. a =0.01 a) 2.624 b)-2.602 c) 2.602 d)-2.6244. When the computed test statistics falls in the acceptance region, what is the best thing to do with the null hypothesis? a) Fail to reject the null hypothesis. b) DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD DDDDDDDDDDDDDDDDDDDFEGRRHRTE c) Type l error 5. What is the critical value of a right tailed test with an alpha level below using z-test. a = 0.10 a) -1.28 b) 1.28 C) 1.65 d) +1.65