=+23. Exercise 5 in Chapter 2 gave n 5 12 observations on daily energy demand readings (kW h) for remote telecommunications stations throughout Cameroon, from which the sample mean and sample standard deviation are 32.59 and 10.66, respectively. Suppose the investigators had believed a priori that true average daily energy demand would be at most 30 kW h. Does the data contradict this prior belief? Assuming normality, test the appropriate hypotheses using a significance level of .05.