A researcher is interested in how people make real-world decisions. First, they ask participants to indicate whether they generally like to make important decisions alone or in collaboration with others. Second, they give participants a list of 10 factors (money, time, family, etc.), and ask them to rank-order the factors based on how important they are when making a decision (in this case, a decision about whether to take a new job). Which variable was measured on an interval scale? Group of answer choices