Determine the appropriate critical value(s) for each of the tests in parts a through d below concerning the population proportion.

icon to view the standard normal distribution table.

a. upper-tailed test: =0.025, n=55

z= (Round to three decimal places as needed. Use a comma to separate answers as needed.)

b.lower-tailed test:=0.005, n=27

z= (Round to three decimal places as needed. Use a comma to separate answers as needed.)

c. two-tailed test: =0.05, n=137

z= (Round to three decimal places as needed. Use a comma to separate answers as needed.)

d. two-tailed test: =0.01, n=16

z= (Round to three decimal places as needed. Use a comma to separate answers as needed.)