Phone reservation agent at a large airline is 40 seconds. A manager with the airline is concerned that business may be lost due to customers having to wait too long for an agent. To address this concern, the manager develops new airline reservation policies that are intended to reduce the amount of time and agent needs to spend with each customer. A random sample of 250 customers results in a sample mean wait-time of 39.3 seconds with a standard deviation of 4.2 seconds. Using a 0.05 level of significance, do you believe the new policies were effective in reducing wait time? Do you think the results have any practical significance? OB. because the P-value is greater than the a 0.05 level of significance. se the P-value is greater than the a=0.05 level of significance. because the P-value is less than the a=0.05 level of significance. context of the problem. sufficient evidence at the a=0.05 level of significance to conclude that the new policies were is D. is not State ti There effective.