Every year, more and more people have to commute to work. A survey of 100 commuters in Southern California determined that their average commute time is 1.6 hours with a standard deviation of 1.25 hours. Suppose that the commute time for Southern California is normally distributed, and that the sample described is representative of all Southern Californians. Researchers claim that commuters in Southern California have an average commute time of more than 1.5 hours. Perform a five step hypothesis test using a 0.05 significance level and determine if there is enough evidence to determine that the claim is true. Write out the hypotheses: Determine critical value(s): I Compute the test statistic: Determine the decision: I Write the concluding statement:
