The distribution of times that the company's service technicians take to respond to trouble calls is normal with mean µ and standard deviation = 0.25 hours. The company advertises which its service technicians take an average of 2 hours to respond to trouble calls from customers. We suspect that average time is really more than 2 hours.
From the random sample of 25 trouble calls, the average time service technicians took to respond was 2.10 hours. How strong is the evidence against the companies claim? Based upon these data, the P -value of the appropriate test is?