Question

As cars passed a checkpoint, the following speeds were clocked and recorded.
Speed (mph): 55 62 61 54 68 72 59 61 70
what's the range? , 1st quartile and 3rd quartile? please.
i know the mean is 62 and themin is 54 and the max is 72 and the 2nd quartile is 61

Answer 1

put them in ascending order.
54/55/59/61/ 61/ 62/ 68/70/72
range 54 to 72
I dont agree with your numbers.
http://www.mathsisfun.com/definitions/quartiles.html

Answer 2

so the range is 54 to 72
the min is 54
the max is 72
1quartile is 55?
2nd is 61
3rd is 70?
did i do good or?