The true average diameter of ball bearings of a certain type is supposed to be .5 in. A one-sample t test will be carried a 5 .01 b(94) 5 .1 m 5 94 Ha H0: m 5 95 : m 2 95 s 5 1.20 x 5 94.32 m 5 76 n 5 100 b(70) 5 .01 z # 22.88 x 5 72.3 a 5 .01 x 5 72.3 X

n 5 25 Ha: m , 75 H0 s 5 9 : m 5 75 n 5 16 x 5 30,960 b(30,500) 5 .05 x 5 30,960 a 5 .01 t # 21.697 Ha: m 2 m0 , n 5 31 t $ 1.697 Ha: m , m0 , n 5 24 t # 22.500 Ha: m . m0 , df 5 15 t $ 3.733 out to see whether this is the case. What conclusion is appropriate in each of the following situations?

a.

b.

c.

d.