III. Conduct each of the following hypothesis tests, using the z or t distribution, as appropriate (two-tailed tests). (12 points; 3 points each item) A. H. : M = 25 Obtained value: S -8 Critical value: n =10 a=.05 Decision: Sta x = 34 B. H. : u =90 Obtained value: re 0 =10 n =42 Critical value: a=.05 Decision: X =85 C. H : M= 100 Obtained value: S =19 n =25 Critical value: a =.05 Decision: x =34 D. H. : H1=0 Obtained value. 0=15 n=50 Critical value. h academic achieve a=.10 Decision: X =3