Discuss the differences between the single t-test, the independent t-test, and the paired-samples t-test. State of the assumptions of each one and compare how they are different. Most importantly, how are the variables different (the amount and type of variables) between the three tests? Next, give a real-world example of when you would use the single t-test, the independent t-test, and the paired-samples t-test. Make sure and state the variables and how they are measured in each example