The following dot plot represents student scores on the Unit 1 math test. Scores are in whole number increments. If the test was out of 20 points, about what percentage of the students scored at least 80% on the test?

17%
48%
67%
12%

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%