A simulated exercise gave n = 30 observations on escape time (sec) for oil workers, from which the sample mean and sample standard deviation are 371.84 and 24.89, respectively. Suppose the investigators had believed a priori that true average escape time would be at most 6 min. Does the data contradict this prior belief? Assuming normality, test the appropriate hypotheses using a significance level of 0.05.

State the appropriate hypotheses.
a. H0 : μ = 360
Ha : μ > 360
b. H0 : μ = 360
Ha : μ < 360
c. H0 : μ = 360
Ha : μ ≤ 360
d. H0 : μ = 360
Ha : μ ≠ 360