Do one of thefollowing, as appropriate.(a) Find the critical value z/2, (b) find the critical value t/2, (c) state that neither the normal nor the t distribution applies.

Confidence level 95%; n=20; isunknown; population appears to be normally distributed.

Click here to view a table of critical t-values.LOADING...

Click here to view page 1 of the standard normal table.LOADING...

Click here to view page 2 of the standard normal table.LOADING...

Find the critical value.

A.

t/2=2.093

B.

z/2=1.96

C.

z/2=1.645

D.

t/2=1.729

E.