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For a null hypothesis, Ho: H = 4,000, if the 5% level of significance is used and the z-test statistic is +6.00, what is our decision regarding the null hypothesis? ( 1) Do not reject Ho. ( 2) Reject Ho. ( 3) Reject H1. ( 4) None Apply. Question 4 (1 point) Saved What are the critical z-values for a two-tailed hypothesis test if a = 0.05? ( 1) +2.000 ( 2) +2.500 ( 3) +1.650 ( 4) +6.000