In Exercises 26, state whether each standardized test statistic z

In Exercises 26, state whether each standardized test statistic z allows you to reject the null hypothesis. Explain your reasoning
(a) z = 1.98
(b) z = -1.89
(c) z = 1.65
(d) z = -1.99
In Exercises 26, state whether each standardized test statistic z