Question: Consider the following. (Give your answers correct to two decimal places.)

(a) Calculate the value for the test statistic, χ2, for Ho: σ2 = 20, n = 19, s2 = 16.1.

(b) Calculate the value for the test statistic, χ2, for Ho: σ2 = 28.6, n = 21, s = 6.9.

(c) Calculate the value for the test statistic, χ2, for Ho: σ = 42.2, n = 19, s = 38.7.

(d) Calculate the value for the test statistic, χ2, for Ho: σ = 10.6, n = 21, s2 = 165.