Average service time before the pandemic was 9 min. A sample of 100 service times after the pandemic was collected, reporting a sample mean = 12 min and a standard deviation = 2 min. Would you conclude that service time has increased after the pandemic? Assume a p-value = 0.21 and alpha is unknown. What is your conclusion?

a) There is no evidence that service time has increased

b) There is extremely strong evidence that service time has increased

c) There is some evidence that service time has increased

d) There is extremely strong evidence that service time has not increased