An R&D team at Tesla is interested in finding the average difference in length of charge of two electric car batteries. They intend to conduct the research to help them choose a battery for the Tesla Model 3. The team takes 40 batteries designed by Tesla and 35 batteries designed a new Taiwanese supplier, and the team measures their duration from a single charge. They run the batteries using a machine. Based on the above scenario, is this test a test of Two Independent Means or Paired Means? Group of answer choices