Find the critical value for testing H0 p 021 versus Ha p 0

Find the critical value for testing H0: p = 0.21 versus Ha: p > 0.21 at significance level 0.05. Round your final answer to three decimal places.

Test is for proportion so z-test will be used. Alternative hypothesis shows that test is right tailed so for level of significance 0.05, critical value of the test is 1.645.