1. The manager of a local fast-food chain wants to improve the service provided to customers who use the drive-up window. As a first step in this process, the manager records how long it takes from the time the customer first enters the drive-in window until they are served their food at the final window. Below are the times (in minutes) for the 30 customers (in order): 3. 4. 6. 6. 9. 10 11 11 12 12 12 12 13 15 16 16 17 17 18 18 18 20 21 22 24 25 33 40 (a) Calculate the median. [2 marks] ANSWER: (b) Calculate the first and third quartile. [2 marks] Q. (c) Calculate the interquartile range. [1 mark] IQR: (d) Calculate the lower and upper limits [2 marks] Lower Upper. (e) List all outliers. Explain why they would be considered outliers. [3 marks] ANSWER: (f) Where would the whiskers on a boxplot of the times extend to on each side? [2 marks]