When would a t-test be used instead of a z-test to assess the Ho? O when the is unknown, and the sample size is large. O when the is known, and the sample size is large. when the is unknown, and the sample size is small. O when the is known, and the sample size is small.Imagine that you conducted an independent groups t-test with 10 participants in each group. For a one-tailed test, the tcv at a = 0.05 would be [Note that the tcv is a critical value] * O 1.729 O 2.101 O 1.734 O 2.093What is the type of hypothesis specified in the following statement? * Statement: Vitamin BB has no effect on the emotional on the emotional status of schizophrenic patients. 0 Alternative hypothesis. 0 Null hypothesis. 0 Experimental hypothesis. 0 Alternate hypothesis. H1: H1 # 12 is the hypothesis for a tailed test. O null; two O alternative; two O null; one O alternative, oneIn a randomized ANOVA, if there are four groups with 15 participants in each group, then the df for F-ratio is equal to * O 60 O 59 O 3, 56 O 3,57If you had rejected the H0 in the vitamin supplement experiment when in fact, the Vitamin supplement did not influence intelligence, you would have made a ' O Typelerror. O Typell error. 0 Type I\" error 0 None of the above