The waiting time for patients at a local hospital emergency department follows a normal distribution with a mean of 55 minutes and a population standard deviation of 15 minutes. The quality-assurance department found in a sample of 50 patients that the mean waiting time was 54 minutes. At the 0.025 significance level, decide if the sample data support the claim that the mean waiting time is less than 55 minutes. State the null and alternative hypotheses. State the decision rule. Based on the sample data, state your decision in terms of the null hypothesis (reject or not reject). You may use either method, comparing the test statistic to the critical value, or the p-value approach.