2. Lindsey is the manager at a local Ruby Tuesday restaurant and has implemented changes to her operation to reduce the average wait time for a table between 6:00pm and 8:00pm on Saturday night to less than 20 minutes. A random sample of 45 wait times on Saturday night had a mean of 18.3 minutes. Lindsay knows from her past experience that the standard deviation of wait times is 5.0 minutes. Follow the steps in the previous section to determine if Lindsay's changes have reduced average wait time to less than 20 minutes using a=0.05. 18.3-20 2=-2.28 5.0/145 Za = -1,645 Since Z