1. Which of the following statements is true about nominal scales? A. It is possible for researchers to rank order the levels of these scale variables from lowest to highest. B. The levels of these scale variables are simply different categories or groups. C. Time. weight, length, and other physical measures are the best examples of these scales. D. The median is the only measure of central tendency that is appropriate if these scales are used. 2. A teacher displays her students' test grades on a notice board. According to the results, 7 students received grade A, 10 students received grade B, 18 students received grade C, 4 students received grade D. and 1 student received grade E. In statistical terms, this Is a A. measure of central tendency. B. measure of variability. C. frequency distribution. D. correlation table. 3. A result is one that has a very low probability of occurring If the null hypothesis is true. A. Simplistic B. Significant C. Specifiable D. Systematic racal