Discuss the below:
Task:
Review the following situation and provide a solution.
Q: A Starbucks manager decides to study waiting times of customers for service at the lunch time rush hour 1100-1200. He observes three customers to measure the time the customer enters the line to the time he or she reaches the counter. The following the information recorded over six days.
Time in Minutes
Day Customer #1 Customer #2 Customer #3
1 3.2 4.4 5.9
2 3.6 5.7 4.3
3 1.5 2.3 3.2
4 1.4 2.0 3.4
5 9.7 4.6 4.8
6 5.3 6.9 3.1
Draw the X-bar Chart and R-chart. Explain the results.