Highest completed education level Frequency Percent Valid Percent Cumulative Percent Valid Middle school or lower 4 .9 .9 .9 High school Undergraduate 23 5.0 5.1 6.0 83 17.9 18.6 24.6 Bachelor's 149 32.1 33.3 57.9 Master's 136 29.3 30.4 88.4 PhD or higher 47 10.1 10.5 98.9 No answer 5 1.1 1.1 100.0 Total 447 96.3 100.0 Missing System 17 3.7 Total 464 100.0 In order for this problem to be graded correctly, please respond with the same answer as those listed in the table. What group has the highest frequency? What group has the lowest frequency? Is this an example of a grouped or ungrouped frequency distribution table?