The box-and-whisker plot represents the heights (in meters) of the tallest buildings in Chicago. a. What percent of the buildings are no taller than 345 meters? About percent of the buildings are no taller than 345 meters.

Erschaconne  ambitiousthe answer is that the median value for the 13-15 year olds is greater than the median value for the 16-18 year olds.  what i do to test this is this: e.g. 13-15 year olds:   i write down the number of hours studying each time it shows up, in increasing order, like this:   6 7 8 10 12 12 12 13 14 14start crossing out numbers on each side until you make your way to the median: 7 8 10 12 12 12 13 148 10 12 12 12 13etc. etc.  you'll reach  12 12you need to take the average of the 2 for the median, which is just 12.  next, do the same for the 16-18 year olds.  3 8 9 9 9 10 13 14 15 18start crossing out numbers on each side until you reach a median.8 9 9 9 10 13 14 159 9 9 10 13 14etc.  you'll reach  9 10  take the average for the median, which is 9.5.  therefore the median for the 13-15 year olds is 12 hours, while the 16-18 year olds is 9.5 hours, proving that the median for the 13-15 year olds is greater.  to disprove the other answers: we know the range for each age group is different because the 13-15 year olds range is 6-14 hours while the 16-18 year olds range is 3-18 hours.  to find the average of the 13-15 year olds hours studying, add up all the hours (6,7,8,10,12,13,14) and divide them by the number of categories you added (7 categories of hours). the answer is not 14, it's 10.the mode is whichever hour appears the most. for the 16-18 year olds, it's 9 hours, as there are 3 dots there, and for the 13-15 year olds, it's 12 hours as there are 3 dots there. therefore the 13-15 year olds study hours are not less than the 16-18 year olds,