Compute the observed significance of each test Some of the i

Compute the observed significance of each test. (Some of the information given might not be needed.)

Testing H0:=17.9 vs. Ha:<17.9; n = 34, x=18.2, s = 0.87, test statistic z=2.01.

Testing H0:=5.5 vs. Ha:5.5; n = 56, x=7.4, s = 4.82, test statistic z = 2.95.

Testing H0:=1255 vs. Ha:>1255; n = 152, x=1257, s = 7.5, test statistic z = 3.29.