As cars passed a checkpoint ,the following speeds were clocked and recorded.

Question

Speed (mph):55,62,61,54,68,72,59,61,70)
Find the mean and the range of the data set .

Answer 1

for mean, add them up, then divide by 9

for range: subtract the lowest from the hightest

Answer 2

Would the mean be 62.44 and the range be -18

Answer 3

62.44 is correct.

The range is always positive because you subtract the lowest number from the highest number. It is 18.