Which classes data would have the lower M. A.D.? How do you know? А
Class 2 because the mean is lower than the mean of Class 1.
B
Class 1 because there is more variability between the mean and the data points.
С
Class 2 because there is less variability between the mean and the data points.
D
The information cannot be determined from the box and whisker plot.

Please answers as soon as possible

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?