Find the appropriate rejection regions for the large-sample test statistic z in these cases:
a. A left-tailed test at the 1% significance level.
b. A two-tailed test with α = .01.
c. Suppose that the observed value of the test statistic was z = - 2.41. For the rejection regions constructed in parts a and b, draw the appropriate conclusion for the tests. If appropriate, give a measure of the reliability of your conclusion.