Dumplings -To-Go (DTG) Provides Take-Out Dumplings and Noodle Dishes to Customers

Multiple Choice

Dumplings -To-Go (DTG) provides take-out dumplings and noodle dishes to customers at its chain of drive-through restaurants. The target for a customer's waiting time is 3.0 minutes +/- 1 minute. Each month, one of the managers observes the drive-through process and collects a sample of 4 waiting times a day over a 6 day period. The data from one restaurant appears below. If DTG were to construct an R-chart from this data, the centerline would be INSERT TABLE HERE

A) 1.00
B) 2.82
C) 3.54
D) 3.81