a). Set up the null and alternative hypotheses to see if the data show that it does indeed take seniors longer than 15 seconds to cross the street.
b). In terms of traffic flow, what are the implications of a Type I error?
c). What are the implications of a Type II error?
d). Find the value of the test statistic.
e). If alpha = 0.05, what is the rejection region?
f). What is your recommendation to the city?
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