Question: A fast-food restaurant monitors its drive-thru service times electronically to ensure that its speed of service is meeting the company's goals. A sample of 28 drivethru times was recently taken and is shown here.
![1232_19.png](https://secure.tutorsglobe.com/CMSImages/1232_19.png)
a. Construct a stem and leaf diagram of the speed of service times.
b. What range of time might the restaurant say is the most frequent speed of service?