Suppose that z is the test statistic. (Provide your answers correct to two decimal places.)
(a) Compute the value of z for Ho: ? = 10, ? = 3.1, n = 42, x = 10.7.
(b) Compute the value of z for Ho: ? = 120, ? = 30, n = 24, x = 126.8.
(c) Compute the value of z for Ho: ? = 18.2, ? = 3.6, n = 141, x = 18.96.
(d) Compute the value of z for Ho: ? = 81, ? = 13, n = 49, x = 79.1.