A researcher claims that X-ray operators have mean identification rate of 82. You have just developed a X-ray training system that, you claim, will increase the number of targets correctly identified....

A researcher claims that X-ray operators have mean identification rate of 82.  You have just developed a X-ray training system that, you claim, will increase the number of targets correctly identified.  Using the data from the 15 trainees you realize a mean identification rate of 85 with Standard Deviation of 4.2. Conduct a single sample t test to determine whether they perform significantly better than the population of X-ray operators trained using the traditional method. (α=0.05)